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A rifle is a long-barreled
firearm A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions). The first firearms originated in 10th-century China, when bamboo tubes ...
designed for accurate
shooting Shooting is the act or process of discharging a projectile from a ranged weapon (such as a gun, bow, crossbow, slingshot, or blowpipe). Even the acts of launching flame, artillery, darts, harpoons, grenades, rockets, and guided missiles ...
, with a barrel that has a helical pattern of grooves ( rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with both hands and braced firmly against the shooter's shoulder via a buttstock for stability during shooting. Rifles are used extensively in warfare,
law enforcement Law enforcement is the activity of some members of government who act in an organized manner to enforce the law by discovering, deterring, rehabilitating, or punishing people who violate the rules and norms governing that society. The term ...
,
hunting Hunting is the human activity, human practice of seeking, pursuing, capturing, or killing wildlife or feral animals. The most common reasons for humans to hunt are to harvest food (i.e. meat) and useful animal products (fur/hide (skin), hide, ...
, shooting sports, and
crime In ordinary language, a crime is an unlawful act punishable by a state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definitions of", in C ...
. The term was originally ''rifled gun'', with the
verb A verb () is a word ( part of speech) that in syntax generally conveys an action (''bring'', ''read'', ''walk'', ''run'', ''learn''), an occurrence (''happen'', ''become''), or a state of being (''be'', ''exist'', ''stand''). In the usual descr ...
''rifle'' referring to the early modern machining process of creating groovings with cutting tools. By the 20th century, the weapon had become so common that the modern
noun A noun () is a word that generally functions as the name of a specific object or set of objects, such as living creatures, places, actions, qualities, states of existence, or ideas.Example nouns for: * Living creatures (including people, alive, ...
''rifle'' is now often used for any long-shaped handheld ranged weapon designed for well-aimed discharge activated by a trigger (e.g., personnel halting and stimulation response rifle, which is actually a
laser dazzler A dazzler is a non-lethal weapon which uses intense directed radiation to temporarily disorient its target with flash blindness. They can effectively deter further advances, regardless of language or cultural barriers, but can also be used for h ...
). Like all typical firearms, a rifle's
projectile A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance. Although any objects in motion through space are projectiles, they are commonly found i ...
( bullet) is propelled by the contained deflagration of a combustible propellant compound (originally
black powder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). T ...
, later cordite, and now
nitrocellulose Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ...
), although other propulsive means are used, such as compressed air in
air rifle An air gun or airgun is a gun that fires projectiles pneumatically with compressed air or other gases that are mechanically pressurized ''without'' involving any chemical reactions, in contrast to a firearm, which pressurizes gases ''chemical ...
s, which are popular for vermin control, small game hunting, competitive target shooting and casual sport shooting ('' plinking''). The distinct feature that separates a rifle from the earlier smoothbore long guns (e.g., arquebuses, muskets) is the rifling within its barrel. The raised areas of a barrel's rifling are called ''lands''; they make contact with and exert
torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...
on the projectile as it moves down the bore, imparting a spin. When the projectile leaves the barrel, this spin persists and lends
gyroscopic A gyroscope (from Ancient Greek γῦρος ''gŷros'', "round" and σκοπέω ''skopéō'', "to look") is a device used for measuring or maintaining orientation and angular velocity. It is a spinning wheel or disc in which the axis of rot ...
stability to the projectile due to
conservation of angular momentum In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational analog of linear momentum. It is an important physical quantity because it is a conserved quantity—the total angular momentum of a closed sy ...
, increasing accuracy and hence effective range. Early long rifles were muzzle-loaders firing spherical balls; the introduction of
breech-loading A breechloader is a firearm in which the user loads the ammunition ( cartridge or shell) via the rear (breech) end of its barrel, as opposed to a muzzleloader, which loads ammunition via the front ( muzzle). Modern firearms are generally breec ...
allowed the use of elongated and aerodynamically efficient bullets, which did not yaw or tumble significantly in flight due to the spin.


Terminology

Historically, rifles only fired a single projectile with each squeeze of the trigger. Modern rifles are commonly classified as single-shot, bolt-action, semi-automatic, or automatic. Single-shot, bolt-action, and semi-automatic rifles are limited by their designs to fire a single shot for each trigger pull. Only automatic rifles are capable of firing more than one round per trigger squeeze; however, some automatic rifles are limited to fixed bursts of two, three, or more rounds per squeeze. Modern automatic rifles overlap to some extent in design and function with
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
s. In fact, many light machine guns (such as the Russian
RPK The RPK (russian: Ручной пулемёт Калашникова/РПК, Ruchnoy Pulemyot Kalashnikova, link=no, English: "Kalashnikov hand-held machine gun"), sometimes retroactively termed the RPK-47, is a Soviet 7.62×39mm light machine ...
) are adaptations of existing automatic rifle designs. A military's light machine guns are typically chambered for the same caliber ammunition as its service rifles. Generally, the difference between an automatic rifle and a machine gun comes down to weight, cooling system, and ammunition feed system. Rifles, with their relatively lighter components (which overheat quickly) and smaller capacity magazines, are incapable of sustained automatic fire in the way that machine guns are; they trade this capability in favor of increased mobility. Modern military rifles are fed by magazines, while machine guns are generally belt-fed. Many machine guns allow the operator to quickly exchange barrels in order to prevent overheating, whereas rifles generally do not. Most machine guns fire from an open bolt in order to reduce the danger of "cook-off", while almost all rifles fire from a closed bolt for accuracy. Machine guns are often crewed by more than one soldier; the rifle is an individual weapon. The term "rifle" is sometimes used to describe larger rifled crew-served weapons firing explosive shells, for example, recoilless rifles and
naval rifle Naval artillery is artillery mounted on a warship, originally used only for naval warfare and then subsequently used for shore bombardment and anti-aircraft roles. The term generally refers to tube-launched projectile-firing weapons and excludes ...
s. In many works of fiction a rifle refers to any weapon that has a stock and is shouldered before firing, even if the weapon is not rifled or does not fire solid projectiles (e.g., a "laser rifle").


Historical overview

The origins of rifling are as difficult to trace, but some of the earliest European experiments seem to have been carried out during the 15th century. Archers had long realized that a twist added to the tail feathers of their arrows gave them greater accuracy. Early muskets produced large quantities of smoke and soot, which had to be cleaned from the action and bore of the musket frequently, either through the action of repeated bore scrubbing, or a deliberate attempt to create "soot grooves" that would allow for more shots to be fired from the firearm. Some of the earliest examples of European grooved gun barrels were reportedly manufactured as early as 1440 and further developed by Gaspard Kollner of
Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...
circa 1498, although other scholars allege they were a joint effort between Kollner and Augustus Kotter of
Nuremberg Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the German state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the 14th-largest ...
circa 1520. Military commanders preferred smoothbore weapons for
infantry Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and mar ...
use because rifles were much more prone to problems due to powder fouling the barrel and because they took longer to reload and fire than muskets. Rifles were created as an improvement in the accuracy of smoothbore muskets. In the early 18th century,
Benjamin Robins Benjamin Robins (170729 July 1751) was a pioneering British scientist, Newtonian mathematician, and military engineer. He wrote an influential treatise on gunnery, for the first time introducing Newtonian science to military men, was an early en ...
, an English mathematician, realized that an elongated bullet would retain the momentum and kinetic energy of a musket ball, but would slice through the air with greater ease. The black powder used in early muzzle-loading rifles quickly fouled the barrel, making loading slower and more difficult. The greater range of the rifle was considered to be of little practical use since the smoke from black powder quickly obscured the battlefield and made it almost impossible to aim the weapon from a distance. Since musketeers could not afford to take the time to stop and clean their barrels in the middle of a battle, rifles were limited to use by sharpshooters and non-military uses like hunting. Muskets were smoothbore, large caliber weapons using spherical ammunition fired at relatively low velocity. Due to the high cost and great difficulty of precision manufacturing, and the need to load readily from the muzzle, the musket ball was a loose fit in the barrel. Consequently, on firing the ball bounced off the sides of the barrel when fired and the final direction on leaving the muzzle was unpredictable. The performance of early muskets defined the style of warfare at the time. Due to the lack of accuracy, soldiers were deployed in long lines (thus line infantry) to fire at the opposing forces. Precise aim was thus not necessary to hit an opponent. Muskets were used for comparatively rapid, imprecisely aimed volley fire, and the average soldier could be easily trained to use them. In the territory of Kentucky, one of the most successful early rifles, the long rifle, was developed over the course of the 18th century. Compared to the more common Brown Bess, they had a tighter bore with no space between bullet and barrel, and still used balls instead of conical bullets. The balls the long rifle used were smaller, allowing the production of more rounds for a given amount of lead. These rifles also had longer barrels, allowing more accuracy, which were rifled with a helical groove. These first started appearing sometime before 1740, one early example being made by Jacob Dickert, a German immigrant. By 1750 there were a number of such manufacturers in the area. The longer barrel was a departure by local gunsmiths from their German roots, allowing bullets to achieve a higher speed (as the burning gunpowder was contained longer) before emerging from the barrel. The rifle was used for precise shooting, aiming, and firing at individual targets, instead of the musket's use for imprecise fire. By the time of the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was a major war of the American Revolution. Widely considered as the war that secured the independence of t ...
, these rifles were commonly used by frontiersmen, and Congress authorized the establishment of ten companies of riflemen. One of the most critical units was
Morgan's Riflemen Morgan's Riflemen or Morgan's Rifles, previously Morgan's Sharpshooters, and the one named Provisional Rifle Corps, were an elite light infantry unit commanded by General Daniel Morgan in the American Revolutionary War, which served a vital role e ...
, led by
Daniel Morgan Daniel Morgan (1735–1736July 6, 1802) was an American pioneer, soldier, and politician from Virginia. One of the most respected battlefield tacticians of the American Revolutionary War of 1775–1783, he later commanded troops during the sup ...
. This sharpshooting unit eventually proved itself integral to the Battle of Saratoga, and in the southern states where General Morgan commanded as well. Taking advantage of the rifle's improved accuracy, Morgan's sharpshooters picked off cannoneers and officers, reducing the impact of enemy artillery. This kind of advantage was considered pivotal in many battles, such as the battles of Cowpens, Saratoga, and King's Mountain. Later during the
Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fre ...
, the British 95th Regiment (Green Jackets) and 60th Regiment, (Royal American), as well as sharpshooters and riflemen during the
War of 1812 The War of 1812 (18 June 1812 – 17 February 1815) was fought by the United States of America and its indigenous allies against the United Kingdom and its allies in British North America, with limited participation by Spain in Florida. It be ...
, used the rifle to great effect during skirmishing. Because of a slower loading time than a musket, they were not adopted by the whole army. Since rifles were used by sharpshooters who did not routinely fire over other men's shoulders, long length was not required to avoid the forward line. A shorter length made a handier weapon in which tight-fitting balls did not have to be rammed so far down the barrel. The invention of the minie balls in the 1840s solved the slow loading problem, and in the 1850s and 1860s rifles quickly replaced muskets on the battlefield. Many rifles, often referred to as rifled muskets, were very similar to the muskets they replaced, but the military also experimented with other designs. Breech-loading weapons proved to have a much faster rate of fire than muzzleloaders, causing military forces to abandon muzzle loaders in favor of breech-loading designs in the late 1860s. In the later part of the 19th century, rifles were generally single-shot, breech-loading guns, designed for aimed, discretionary fire by individual soldiers. Then, as now, rifles had a stock, either fixed or folding, to be braced against the shoulder when firing. The adoption of cartridges and breech-loading in the 19th century was concurrent with the general adoption of rifles. In the early part of the 20th century, soldiers were trained to shoot accurately over long ranges with high-powered cartridges. World War I
Lee–Enfield The Lee–Enfield or Enfield is a bolt-action, magazine-fed repeating rifle that served as the main firearm of the military forces of the British Empire and Commonwealth during the first half of the 20th century, and was the British Army's sta ...
rifles (among others) were equipped with long-range 'volley sights' for massed firing at ranges of up to . Individual shots were unlikely to hit, but a platoon firing repeatedly could produce a 'beaten ground' effect similar to light artillery or machine guns. Currently, rifles are the most common firearm in general use for
hunting Hunting is the human activity, human practice of seeking, pursuing, capturing, or killing wildlife or feral animals. The most common reasons for humans to hunt are to harvest food (i.e. meat) and useful animal products (fur/hide (skin), hide, ...
(with the exception of bird hunting, where shotguns are favored). Rifles derived from military designs have long been popular with civilian shooters.


19th century

During the
Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fre ...
the British army created several experimental units known as "Rifles", armed with the Baker rifle. These Rifle Regiments were deployed as skirmishers during the Peninsular war in Spain and Portugal, and were more effective than skirmishers armed with muskets due to their accuracy and long range.


Muzzle-loading

Gradually, rifles appeared with cylindrical barrels cut with helical grooves, the surfaces between the grooves being "lands". The innovation was shortly followed by the mass adoption of breech-loading weapons, as it was not practical to push an overbore bullet down through a rifled barrel. The dirt and grime from prior shots were pushed down ahead of a tight bullet or ball (which may have been a looser fit in the clean barrel before the first shot), and loading was far more difficult, as the lead had to be deformed to go down in the first place, reducing the accuracy due to deformation. Several systems were tried to deal with the problem, usually by resorting to an under-bore bullet that expanded upon firing. The original muzzle-loading rifle, with a closely fitting ball to take the rifling grooves, was loaded with difficulty, particularly when foul, and for this reason was not generally used for military purposes. With the advent of rifling the bullet itself did not initially change but was wrapped in a greased, cloth patch to grip the rifling grooves. The first half of the 19th century saw a distinct change in the shape and function of the bullet. In 1826 Delvigne, a French
infantry Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and mar ...
officer, invented a breech with abrupt shoulders on which a spherical bullet was rammed down until it caught the rifling grooves. Delvigne's method, however, deformed the bullet and was inaccurate. Soon after, the Carabine à tige was invented by Louis-Etienne de Thouvenin, which had a stem at the bottom of the barrel that would deform and expand the base of the bullet when rammed, therefore enabling accurate contact with the rifling. However, the area around the stem clogged and got dirty easily.


Minié system – the "rifled musket"

One of the most famous was the Minié system, invented by French Army Captain Claude-Étienne Minié, which relied on a conical bullet (known as a Minié ball) with a hollow skirt at the base of the bullet. When fired, the skirt would expand from the pressure of the exploding charge and grip the rifling as the round was fired. The better seal gave more power, as less gas escaped past the bullet. Also, for the same bore ( caliber) diameter a long bullet was heavier than a round ball. The extra grip also spun the bullet more consistently, which increased the range from about 50 yards for a smoothbore musket to about 300 yards for a rifle using the Minié system. The expanding skirt of the Minié ball also solved the problem that earlier tight-fitting bullets were difficult to load as black powder residue fouled the inside of the barrel. The Minié system allowed conical bullets to be loaded into rifles just as quickly as round balls in smooth bores, which allowed rifle muskets to replace muskets on the battlefield. Minié system rifles, notably the U.S. Springfield and the British Enfield of the early 1860s featured prominently in the
U.S. Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states ...
, due to their enhanced power and accuracy. Over the 19th century, bullet design also evolved, the bullets becoming gradually smaller and lighter. By 1910 the standard blunt-nosed bullet had been replaced by the pointed, 'spitzer' bullet, an innovation that increased range and penetration. Cartridge design evolved from simple paper tubes containing
black powder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). T ...
and shot, to sealed brass cases with integral primers for ignition, and black powder was replaced by cordite, and then other nitro-cellulose-based
smokeless powder Finnish smokeless powderSmokeless powder is a type of propellant used in firearms and artillery that produces less smoke and less fouling when fired compared to gunpowder ("black powder"). The combustion products are mainly gaseous, compared t ...
mixtures, propelling bullets to higher velocities than before. The increased velocity meant that new problems arrived, and so bullets went from being soft lead to harder lead, then to copper-jacketed, in order to better engage the spiral grooves without "stripping" them in the same way that a screw or bolt thread would be stripped if subjected to extreme forces.


Breech loading

From 1836, breech-loading rifles were introduced with the German Dreyse Needle gun, followed by the French Tabatière in 1857, and the British Calisher and Terry carbine made in Birmingham and later in 1864 and the better known British Snider–Enfield. Primitive chamber-locking mechanisms were soon replaced by
bolt-action Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-actio ...
mechanisms, exemplified by the Chassepot in 1866. Breech-loading was to have a major impact on warfare, as breech-loading rifles can be fired at a rate many times higher than muzzle-loaded rifles and significantly can be loaded from a prone rather than standing position. Firing prone (i.e., lying down) is more accurate than firing from a standing position, and a prone rifleman presents a much smaller target than a standing soldier. The higher accuracy and range, combined with reduced vulnerability generally benefited the defense while making the traditional battle between lines of standing and volleying infantrymen obsolete.


Revolving rifle

Revolving rifles were an attempt to increase the rate of fire of rifles by combining them with the revolving firing mechanism that had been developed earlier for revolving pistols. Colt began experimenting with revolving rifles in the early 19th century, and other manufacturers like Remington later experimented with them as well. The Colt Revolving Rifle Model 1855 was an early repeating rifle and the first one to be used by the U.S. Government and saw some limited action during the
American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States. It was fought between the Union (American Civil War), Union ("the North") and t ...
. Revolvers, both rifles and pistols, tend to spray fragments of metal from the front of the cylinder.


Repeating rifle

The
Winchester repeating rifle Winchester rifle is a comprehensive term describing a series of lever action repeating rifles manufactured by the Winchester Repeating Arms Company. Developed from the 1860 Henry rifle, Winchester rifles were among the earliest repeaters. The M ...
was invented in 1866. The firer pulled on a lever to reload the rifle with a stored cartridge.


Cartridge storage

An important area of development was the way that cartridges were stored and used in the weapon. The
Spencer repeating rifle The Spencer repeating rifles and carbines were 19th-century American lever-action firearms invented by Christopher Spencer. The Spencer was the world's first military metallic-cartridge repeating rifle, and over 200,000 examples were manufactur ...
was a breech-loading manually operated lever-action rifle that was adopted by the United States. Over 20,000 were used during the American Civil War. It was the first adoption of a removable magazine-fed infantry rifle. The design was completed by Christopher Spencer in 1860. It used copper rimfire cartridges stored in a removable seven-round tube magazine, enabling the rounds to be fired one after another. When the magazine was empty, it could be exchanged for another.


20th century

In the
Russo-Japanese War The Russo-Japanese War ( ja, 日露戦争, Nichiro sensō, Japanese-Russian War; russian: Ру́сско-япóнская войнá, Rússko-yapónskaya voyná) was fought between the Empire of Japan and the Russian Empire during 1904 and 1 ...
of 1904–1905, military observers from Europe and the United States witnessed a major conflict fought with high velocity
bolt-action rifles Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-action ...
firing
smokeless powder Finnish smokeless powderSmokeless powder is a type of propellant used in firearms and artillery that produces less smoke and less fouling when fired compared to gunpowder ("black powder"). The combustion products are mainly gaseous, compared t ...
. The Battle of Mukden fought in 1905 consisted of nearly 343,000 Russian troops against over 281,000 Japanese troops. The Russian Mosin–Nagant Model 1891 in 7.62mm was pitted against the Japanese Arisaka Type 30 bolt-action rifle in 6.5mm; both had velocities well over the 19th-century black powder velocities of under 2,000 feet per second (610 m/s). Until the late 19th century rifles tended to be very long, some long rifles reaching approximately 2 m (6 ft) in length to maximize accuracy, making early rifles impractical for use by cavalry. However, following the advent of more powerful smokeless powder, a shorter barrel did not impair accuracy as much. As a result, cavalry saw limited, but noteworthy, usage in 20th-century conflicts. The advent of the massed, rapid firepower of the
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
,
submachine gun A submachine gun (SMG) is a magazine-fed, automatic carbine designed to fire handgun cartridges. The term "submachine gun" was coined by John T. Thompson, the inventor of the Thompson submachine gun, to describe its design concept as an autom ...
and rifled
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during si ...
was so quick as to outstrip the development of any way to attack a trench defended by riflemen and machine gunners. The carnage of World War I was perhaps the greatest vindication and vilification of the rifle as a military weapon. The
M1 Garand The M1 Garand or M1 rifleOfficially designated as U.S. rifle, caliber .30, M1, later simply called Rifle, Caliber .30, M1, also called US Rifle, Cal. .30, M1 is a semi-automatic rifle that was the service rifle of the U.S Army during World W ...
was a semi-automatic rapid-fire rifle developed for modern warfare use in World War II. During and after World War II it became accepted that most infantry engagements occurred at ranges of less than 300 m; the range and power of the large full-powered rifle cartridges were "overkill", requiring weapons heavier than otherwise necessary. This led to Germany's development of the 7.92×33mm ''Kurz'' (short) round, the MKb-42, and ultimately, the assault rifle. Today, an infantryman's rifle is optimized for ranges of 300 m or less, and soldiers are trained to deliver individual rounds or bursts of fire within these distances. Typically, the application of accurate, long-range fire is the domain of the marksman and the
sniper A sniper is a military/paramilitary marksman who engages targets from positions of concealment or at distances exceeding the target's detection capabilities. Snipers generally have specialized training and are equipped with high-precision r ...
in warfare, and of enthusiastic target shooters in peacetime. The modern
marksman rifle A designated marksman rifle (DMR) is a modern scoped high-precision rifle used by infantrymen in the designated marksman (DM) role. It generally fills the engagement range gap between a service rifle and a dedicated sniper rifle, at around ...
and sniper rifle are usually capable of accuracy better than 0.3
mrad The Barrett MRAD (Multi-role Adaptive Design) is a bolt-action sniper rifle designed by Barrett to meet the requirements of the SOCOM PSR. The MRAD is based on the Barrett 98B and includes a number of modifications and improvements. The Barre ...
at 100 yards (1 arcminute).


3D printed rifle

The Grizzly is a 3D printed .22-caliber rifle created around August 2013. It was created using a Stratasys Dimension 1200es printer. It was created by a Canadian only known by the pseudonym "Matthew" who told The Verge that he was in his late 20s, and his main job was making tools for the construction industry.First 3-D printed rifle fires bullet, then breaks
NBC News, 26 July 2013. ()
World's first 3D-printed rifle gets update, fires 14 shots
The Verge, 4 August 2013.()
The original Grizzly fired a single shot before breaking. Grizzly 2.0 fired fourteen bullets before getting damaged due to the strain. In October 2020, another 3D-printed 9mm rifle known as the "FGC-9mm" was created. It is reported that it can be made in 2 weeks with $500 of tools. A second model was later made in April 2021.


Youth rifle

A youth rifle is a rifle designed or modified for fitting children or other small-framed shooters. A youth rifle is often a single-shot
.22 caliber .22 caliber, or 5.6 mm caliber, refers to a common firearms bore diameter of 0.22 inch (5.6 mm). Cartridges in this caliber include the very widely used .22 Long Rifle and .223 Remington / 5.56×45mm NATO. .22 inch is also a popular ...
rifle, or a
bolt-action Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-actio ...
rifle, although some youth rifles are semi-automatic. They are usually very light, with a greatly shortened length of pull, which is necessary to accommodate children. Youth stocks are available for many popular rifles, such as the Ruger 10/22, a semi-automatic .22 LR rifle, allowing a youth rifle to be made from a standard rifle by simply changing the stock. The typical ages of shooters for such rifles vary from about age 5+.


Technical aspects


Rifling

The usual form of rifling was helical grooves in a round bore. Some early rifled firearms had barrels with a twisted polygonal bore. The Whitworth rifle was the first such type designed to spin the round for accuracy. Bullets for these guns were made to match the shape of the bore so the bullet would grip the rifle bore and take a spin that way. These were generally large caliber weapons, and the ammunition still did not fit tightly in the barrel. Many different shapes and degrees of spiraling were used in experimental designs. One widely produced example was the Metford rifling in the Pattern 1888 Lee–Metford service rifle. Although uncommon, polygonal rifling is still used in some weapons today, one example being the
Glock Glock is a brand of polymer- framed, short recoil-operated, locked-breech semi-automatic pistols designed and produced by Austrian manufacturer Glock Ges.m.b.H. The firearm entered Austrian military and police service by 1982 after it was ...
line of pistols (which fire standard bullets). Many of the early designs were prone to dangerous backfiring, which could lead to the destruction of the weapon and serious injury to the person firing it.


Barrel wear

As the bullet enters the barrel, it inserts itself into the rifling, a process that gradually wears down the barrel, and also causes the barrel to heat up more rapidly. Therefore, some
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
s are equipped with quick-change barrels that can be swapped every few thousand rounds, or in earlier designs, were water-cooled. Unlike older carbon
steel Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistan ...
barrels, which were limited to around 1,000 shots before the extreme heat caused accuracy to fade, modern
stainless steel Stainless steel is an alloy of iron that is resistant to rusting and corrosion. It contains at least 11% chromium and may contain elements such as carbon, other nonmetals and metals to obtain other desired properties. Stainless steel's r ...
barrels for target rifles are much more resistant to wear, allowing many thousands of rounds to be fired before accuracy drops. (Many shotguns and small arms have chrome-lined barrels to reduce wear and enhance corrosion resistance. This is rare on rifles designed for extreme accuracy, as the plating process is difficult and liable to reduce the effect of the rifling.) Modern ammunition has a hardened lead core with a softer outer cladding or jacket, typically of an alloy of copper and nickel –
cupro-nickel Cupronickel or copper-nickel (CuNi) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel-copper alloy that contains a min ...
. Some ammunition is coated with molybdenum disulfide to further reduce internal friction – the so-called 'moly-coated' bullet.


Rate of fire

Rifles were initially single-shot, muzzle-loading weapons. During the 18th century, breech-loading weapons were designed, which allowed the rifleman to reload while under cover, but defects in manufacturing and the difficulty in forming a reliable gas-tight seal prevented widespread adoption. During the 19th century, multi-shot repeating rifles using
lever A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or '' fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is d ...
, pump or linear bolt actions became standard, further increasing the rate of fire and minimizing the fuss involved in loading a firearm. The problem of proper seal creation had been solved with the use of brass cartridge cases, which expanded in an
elastic Elastic is a word often used to describe or identify certain types of elastomer, elastic used in garments or stretchable fabrics. Elastic may also refer to: Alternative name * Rubber band, ring-shaped band of rubber used to hold objects togethe ...
fashion at the point of firing and effectively sealed the breech while the pressure remained high, then relaxed back enough to allow for easy removal. By the end of the 19th century, the leading bolt-action design was that of Paul Mauser, whose action—wedded to a reliable design possessing a five-shot magazine—became a world standard through two world wars and beyond. The Mauser rifle was paralleled by Britain's ten-shot
Lee–Enfield The Lee–Enfield or Enfield is a bolt-action, magazine-fed repeating rifle that served as the main firearm of the military forces of the British Empire and Commonwealth during the first half of the 20th century, and was the British Army's sta ...
and America's 1903
Springfield Rifle The term Springfield rifle may refer to any one of several types of small arms produced by the Springfield Armory in Springfield, Massachusetts, for the United States armed forces. In modern usage, the term "Springfield rifle" most commonly refer ...
models. The American M1903 closely copied Mauser's original design.


Range

Barrel rifling dramatically increased the range and accuracy of the musket. Indeed, throughout its development, the rifle's history has been marked by increases in range and accuracy. From the
Minié rifle The Minié rifle was an important infantry rifle of the mid-19th century. A version was adopted in 1849 following the invention of the Minié ball in 1847 by the French Army captain Claude-Étienne Minié of the Chasseurs d' Orléans and Hen ...
and beyond, the rifle has become ever more potent at long-range strikes. In recent decades, large-caliber anti-materiel rifles, typically firing between 12.7 mm and 20 mm caliber cartridges, have been developed. The US
Barrett M82A1 The Barrett M82 (standardized by the U.S. military as the M107) is a recoil-operated, semi-automatic anti-materiel rifle developed by the American company Barrett Firearms Manufacturing. Also called the Light Fifty (due to its chambering of ...
is probably the best-known such rifle. A second example is the AX50 by Accuracy International. These weapons are typically used to strike critical, vulnerable targets such as computerized command and control vehicles, radio trucks, radar antennae, vehicle engine blocks and the jet engines of enemy aircraft. Anti-materiel rifles can be used against human targets, but the much higher weight of rifle and ammunition, and the massive recoil and muzzle blast, usually make them less than practical for such use. The Barrett M82 is designed with a maximum effective range of , although it has a confirmed kill distance of in
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is borde ...
during Operation Anaconda in 2002. The record for the longest confirmed kill shot stands at , set by an unnamed soldier with Canada's elite special operations unit Joint Task Force 2 using a McMillan TAC-50 sniper rifle.


Bullet rotational speed (RPM)

Bullets leaving a rifled barrel can spin at a rotational speed of over 100,000 revolutions per minute (rpm) (or over about 1.67 kilohertz, since 1 RPM = 1/60 Hz). The rotational speed depends both on the muzzle velocity of the bullet and the pitch of the rifling. Excessive rotational speed can exceed the bullet's designed limits and the inadequate centripetal force will fail to keep the bullet from disintegrating in a radial fashion. The rotational speed of the bullet can be calculated by using the formula below. *MV / twist rate = rotational speed Using metric units, the formula divides the number of millimeters in a meter (1000) by the barrel twist in millimeters (the length of travel along the barrel per full rotation). This number is then multiplied by the muzzle velocity in meters per second (m/s) and the number of seconds in a minute (60). *MV (in m/s) × (1000 mm /twist) × 60 s/min = Bullet RPM For example, using a barrel that has a twist rate of 190 mm with a muzzle velocity of 900 m/s: *900 m/s × (1000 mm /(190 mm)) × 60 s/min = 284 210 RPM Using imperial units, the formula divides the number of inches in a foot (12) by the rate of twist that the barrel has. This number is multiplied by the muzzle velocity (MV) and the number of seconds in a minute (60). For example, a bullet with a muzzle velocity of leaving a barrel that twists once per foot (1/12") would rotate at 180,000rpm. *MV (in fps) × (12 in. /twist rate) × 60 s/min. = Bullet RPM For example, using a barrel that has a twist rate of 1 turn in 8" with a muzzle velocity of 3000 ft/s: *3000 fps × (12"/(8"/rotation)) × 60 s/min. = 270,000 RPM


Caliber

Rifles may be chambered in a variety of calibers (bullet or barrel diameters), from as low as 4.4 mm ( .17 inch) varmint calibers to as high as 20 mm (.80 caliber) in the case of the largest anti-tank rifles. The term caliber essentially refers to the width of the bullet fired through a rifle's barrel. Armies have consistently attempted to find and procure the most lethal and accurate caliber for their firearms. The standard calibers used by the world's militaries tend to follow worldwide trends. These trends have significantly changed during the centuries of firearm design and re-design. Muskets were normally chambered for large calibers, such as .50 or .59 (12.7 mm or 15 mm), with the theory that these large bullets caused the most damage. During World War I and II, most rifles were chambered in .30 caliber (7.62 mm), a combination of power and speed. Examples would be the
.303 British The .303 British (designated as the 303 British by the C.I.P. and SAAMI) or 7.7×56mmR, is a calibre rimmed rifle cartridge. The .303 inch bore diameter is measured between rifling lands as is the common practice in Europe which follows th ...
Lee–Enfield The Lee–Enfield or Enfield is a bolt-action, magazine-fed repeating rifle that served as the main firearm of the military forces of the British Empire and Commonwealth during the first half of the 20th century, and was the British Army's sta ...
, the American M1903 .30-06, and the German 8mm Mauser K98. An exception was the Italian Modello 91 rifle, which used the 6.5×52mm Mannlicher–Carcano cartridge. Detailed study of infantry combat during and after World War II revealed that most small-arms engagements occurred within 100 meters, meaning that the power and range of the traditional .30-caliber weapons (designed for engagements at 500 meters and beyond) were essentially wasted. The single greatest predictor of an individual soldier's combat effectiveness was the number of rounds he fired. Weapons designers and strategists realized that service rifles firing smaller-caliber projectiles would allow troops to carry far more ammunition for the same weight. The lower recoil and more generous magazine capacities of small-caliber weapons also allow troops a much greater volume of fire, compared to historical battle rifles. Smaller, faster traveling, less stable projectiles have also demonstrated greater terminal ballistics and therein, a greater lethality than traditional .30-caliber rounds. Most modern service rifles fire a projectile of approximately 5.56 mm. Examples of firearms in this range are the American 5.56 mm
M16 The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-roun ...
and the Russian 5.45×39mm AK-74.


Types of rifle


By mechanism

*
Air gun An air gun or airgun is a gun that fires projectiles pneumatically with compressed air or other gases that are mechanically pressurized ''without'' involving any chemical reactions, in contrast to a firearm, which pressurizes gases ''chemical ...
** Spring-piston *** Break barrel *** Fixed barrel **** Underlever **** Sidelever **** Overlever ** Pneumatic (internal pressure reservoir) *** Pump pneumatic, either single-stroke or multi-stroke *** Pre-charged pneumatic (PCP) ** Compressed gas (external pressure reservoir) *** CO2 *** High pressure air (HPA) *
Firearm A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions). The first firearms originated in 10th-century China, when bamboo tubes ...
** Single-shot *** Muzzle-loading rifle, some
flintlock Flintlock is a general term for any firearm that uses a flint-striking ignition mechanism, the first of which appeared in Western Europe in the early 16th century. The term may also apply to a particular form of the mechanism itself, also know ...
and mostly
caplock The percussion cap or percussion primer, introduced in the early 1820s, is a type of single-use percussion ignition device for muzzle loader firearm locks enabling them to fire reliably in any weather condition. This crucial invention gave rise ...
*** Breech-loading rifle **** Breechblock rifle, either trapdoor, rolling, dropping, tilting or screwed ****
Break-action Break action is a type of firearm action in which the barrel or barrels are hinged much like a door and rotate perpendicularly to the bore axis to expose the breech and allow loading and unloading of cartridges. A separate operation may be requir ...
rifle **** Double rifle ( list) ** Repeating *** Manual ****
Revolving rifle A rifle is a long-barreled firearm designed for accurate shooting, with a barrel that has a helical pattern of grooves (rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with b ...
**** Lever-action rifle, e.g. Winchester rifle,
Spencer rifle The Spencer repeating rifles and carbines were 19th-century American lever-action firearms invented by Christopher Spencer. The Spencer was the world's first military metallic-cartridge repeating rifle, and over 200,000 examples were manufacture ...
****
Pump-action Pump action or slide action is a repeating firearm action that is operated manually by moving a sliding handguard on the gun's forestock. When shooting, the sliding forend is pulled rearward to eject any expended cartridge and typically to co ...
rifle, e.g. Colt Lightning Carbine ****
Bolt-action rifle Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-actio ...
***** Turn-pull, e.g. Mauser G98, Lee-Enfield, Mosin-Nagant ***** Straight-pull, e.g. Ross rifle, K31, Mannlicher M1895,
Blaser R93 The Blaser R93 is a straight-pull action precision rifle offered in a multitude of calibers and barrel lengths manufactured by the German firearms manufacturer Blaser. Designed by Blasers' designer Mr. Meinhard Zeh in 1993, it had a numbe ...
/ R8 **** Bolt-release rifle, also known as lever-release rifle, e.g. Verney-Carron SpeedLine *** Self-loading ****
Semi-automatic rifle A semi-automatic rifle is an autoloading rifle that fires a single cartridge with each pull of the trigger, and uses part of the fired cartridge's energy to eject the case and load another cartridge into the chamber. For comparison, a bolt ...
**** Automatic rifle ***** Selective-fire rifle


By usage

*
Military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...
and
law enforcement Law enforcement is the activity of some members of government who act in an organized manner to enforce the law by discovering, deterring, rehabilitating, or punishing people who violate the rules and norms governing that society. The term ...
**
Anti-materiel rifle An anti-materiel rifle (AMR) is a rifle designed for use against military equipment, structures, and other hardware ( materiel). Anti-materiel rifles are chambered in significantly larger calibers than conventional rifles and are employed to elim ...
** Anti-tank rifle ** Long rifle ** Personal defense weapon **Precision rifle ***
Designated marksman rifle A designated marksman rifle (DMR) is a modern scoped high- precision rifle used by infantrymen in the designated marksman (DM) role. It generally fills the engagement range gap between a service rifle and a dedicated sniper rifle, at aroun ...
*** Sniper rifle ( list) ** Scout rifle **
Service rifle A service rifle (or standard-issue rifle) is a rifle a military issues to regular infantry. In modern militaries, this is typically a versatile and rugged battle rifle, assault rifle, or carbine suitable for use in nearly all environments. M ...
*** Assault rifle ( list) *** Battle rifle ( list) *** Carbine ( list) *
Civilian Civilians under international humanitarian law are "persons who are not members of the armed forces" and they are not " combatants if they carry arms openly and respect the laws and customs of war". It is slightly different from a non-combatant ...
**
Hunting rifle A rifle is a long-barreled firearm designed for accurate shooting, with a barrel that has a helical pattern of grooves (rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with bo ...
*** Buffalo rifle ***
Elephant rifle An elephant gun is a large caliber gun, rifled or smoothbore, originally developed for use by big-game hunters for elephant and other large game. Elephant guns were black powder muzzle-loaders at first, then black powder express rifles, then ...
*** Express rifle ** Match/target rifle ***
Benchrest rifle A benchrest rifle, also colloquially called a "rail gun", is a rifle with its barrel and action mechanism built into a machine rest, used mainly for benchrest shooting. The rifle has no proper stock and its base uses adjustable feet to provide ...
**
Modern sporting rifle An AR-15-style rifle is any lightweight semi-automatic rifle based on the Colt AR-15 design. The original ArmaLite AR-15 is a scaled-down derivative of Eugene Stoner's ArmaLite AR-10 design. The then Fairchild Engine and Airplane Corporation ...
** Short-barreled rifle **
Varmint rifle Varmint rifle is an American English term for a small-caliber precision firearm or high-powered airgun primarily used for both varmint hunting (the elimination of outdoor animals which harass properties) and pest control (the eradication of indoor ...


See also

* Advanced Combat Rifle/ Project Abakan * Antique firearms * British military rifles *
Gun safety Gun safety is the study and practice of using, transporting, storing and disposing of firearms and ammunition, including the training of gun users, the design of weapons, and formal and informal regulation of gun production, distribution, and u ...
* Handgun * List of assault rifles * List of battle rifles * List of multiple barrel rifles *
List of rifle cartridges List of rifle cartridges, by primer type, calibre and name. File:Cartridge Sample 2.jpg, 350px, From left to right: 1 .17 HM2,2 .17 HMR, 2.5 .17 wsm, 3 .22LR, 4 .22 WMR, 5 .17/23 SMc, 6 5mm/35 SMc, 7 .22 Hornet, 8 .223 Remington, 9 .223 WS ...
* List of sniper rifles * Objective Individual Combat Weapon * Rifle grenade * Rifling * Rifled musket *
Service rifle A service rifle (or standard-issue rifle) is a rifle a military issues to regular infantry. In modern militaries, this is typically a versatile and rugged battle rifle, assault rifle, or carbine suitable for use in nearly all environments. M ...
*
Shooting Shooting is the act or process of discharging a projectile from a ranged weapon (such as a gun, bow, crossbow, slingshot, or blowpipe). Even the acts of launching flame, artillery, darts, harpoons, grenades, rockets, and guided missiles ...
* Shooting at the Summer Olympics * Shooting range * Shooting sport *
Shotgun A shotgun (also known as a scattergun, or historically as a fowling piece) is a long-barreled firearm designed to shoot a straight-walled cartridge known as a shotshell, which usually discharges numerous small pellet-like spherical sub- pr ...
* Silencer (firearms) *
Telescopic sight A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as a '' reticle'' – mounted in a focally appropriate ...
*
Precision-guided firearm Precision guided firearms (PGFs) are long-range rifle systems designed to improve the accuracy of shooting at targets at extended ranges through target tracking, heads-up display, and advanced fire control. Inspired by missile lock-on and fighter j ...


References


External links

* Mick Bennett,
The Story of the Rifle
', a booklet from 1945 in PDF format * Friedrich Engels
"On Rifled Cannon"
articles from the New York ''Tribune'', April, May and June, 1860, reprinted in ''Military Affairs'' 21, no. 4 (Winter 1957) ed. Morton Borden, 193–198. {{Authority control Hunting equipment Infantry Personal weapons