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Point-blank Range
Point-blank range is any distance over which a certain firearm or gun can hit a target without the need to elevate the barrel to compensate for bullet drop, i.e. the gun can be pointed horizontally at the target. For targets beyond-blank range, the shooter will have to point the barrel of their firearm at a position above the target, and firearms that are designed for long range firefights usually have adjustable sights to help the shooter hit targets beyond point-blank range. The maximum point-blank range of a firearm will depend on a variety of factors such as muzzle velocity and the size of the target. In popular usage, point-blank range has come to mean extremely close range with a firearm, yet not close enough to be a contact shot. Point-blank (when describing a person) means direct or blunt. History The term ''point-blank'' dates to the 1570s and is probably of French origin, deriving from , "pointed at white". It is thought the word ''blanc'' may be used to describe a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M1917 Ladder Sight Bruce Canfield
M1917 may refer to any of a number of types of equipment under the model-year nomenclature: * M1917 bayonet, the bayonet used with the US M1917 Enfield rifle and later with US Army combat shotguns * M1917 Browning machine gun, a belt-fed water-cooled machine gun * M1917 Revolver, a .45 ACP revolver produced by Colt and Smith & Wesson * M1917 Enfield, an American bolt-action rifle * M1917 light tank, a light tank in US Army service, a near copy of the Renault FT * 75 mm gun M1917, a US-manufactured variant of the British QF 18-pounder artillery gun * M1917 155 mm Gun, a US-manufactured version of the French Canon de 155mm GPF in US service * M1917 155 mm Howitzer, the French Canon de 155 C modèle 1917 Schneider used in US service * M1917 Helmet, a modified version of the Brodie helmet * an update of the first version of the German Stahlhelm steel helmet * M1917 Trench knife#US trench knives, trench knife See also * M1918 Browning Automatic Rifle, adopted in 1917 but designated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistics
Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially weapon munitions such as bullets, unguided bombs, rockets and the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance. A ballistic body is a free-moving body with momentum, which can be subject to forces such as those exerted by pressurized gases from a gun barrel or a propelling nozzle, normal force by rifling, and gravity and air drag during flight. A ballistic missile is a missile that is missile guidance, guided only during the relatively brief initial phase of powered flight, with the trajectory subsequently governed by the laws of classical mechanics, in contrast to (for example) a cruise missile, which is aerodynamics, aerodynamically guided in powered flight like a fixed-wing aircraft. History and prehistory The earliest known ballistic projectiles were stones, spears, and the throwing s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Table Of Handgun And Rifle Cartridges
This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads). Legend * Factory loadings. Number of manufacturers producing complete cartridges - e.g. Norma, RWS, Hornady, Winchester, Federal, Remington, Sellier & Bellot, Prvi Partizan. May be none for obsolete and wildcat cartridges. * H/R: Handgun (H) or rifle (R) - dominant usage of the cartridge (although several dual-purpose cartridges exist) * Size: Metric size - may not be official * MV: Muzzle velocity, in feet-per-second * ME: Muzzle energy, in foot-pounds * P: Momentum, in pound (force) (lbf) times seconds. A guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The .30-06 Springfield (at 2.064 lbf-s) is cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different sightline, lines of sight and is measured by the angle or half-angle of inclination between those two lines. Due to perspective (graphical), foreshortening, nearby objects show a larger parallax than farther objects, so parallax can be used to determine distances. To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax. Here, the term ''Stellar parallax, parallax'' is the semi-angle of inclination between two sight-lines to the star, as observed when Earth is on opposite sides of the Sun in its orbit. These distances form the lowest rung of what is called "the cosmic distance ladder", the first in a succession of methods by which astronomers determine the distances to celestial objects, serving as a basis for other distance measurements in astronomy forming the higher rungs of the ladder. Because parallax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Sights
Iron sights are a system of physical alignment markers used as a sighting device to assist the accurate aiming of ranged weapons such as firearms, airguns, crossbows, and bows, or less commonly as a primitive finder sight for optical telescopes. Iron sights, which are typically made of metal, are the earliest and simplest type of sighting device. Since iron sights neither magnify nor illuminate the target, they rely completely on the viewer's naked eye and the available light by which the target is visible. In this respect, iron sights are distinctly different from optical sight designs that employ optical manipulation or active illumination, such as telescopic sights, reflector (reflex) sights, holographic sights, and laser sights. Iron sights are typically composed of two components mounted perpendicularly above the weapon's bore axis: a 'rear sight' nearer (or 'proximal') to the shooter's eye, and a 'front sight' farther forward (or 'distal') near the muzzle. During ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
StG 44
The StG 44 (abbreviation of Sturmgewehr 44, "assault rifle 44") is a German assault rifle developed during World War II by Hugo Schmeisser. It is also known by its early designations as the MP 43 and MP 44 (''Maschinenpistole 43'' and ''44''). The StG 44 was an improvement of an earlier design, the Maschinenkarabiner 42(H). The StG 44 was the first successful assault rifle, with features including an intermediate cartridge, controllable automatic fire, a more compact design than a battle rifle with a higher rate of fire, and being designed primarily for hitting targets within a few hundred metres. Other rifles at the time were designed to hit targets at greater ranges, but this was found to be in excess of the range in which most enemy engagements actually took place. The StG 44 fulfilled its role effectively, particularly on the Eastern Front, offering a greatly increased volume of fire compared to standard infantry rifles. The StG largely influenced the Soviet AK-47, introd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assault Rifle
An assault rifle is a select fire rifle that uses an intermediate cartridge, intermediate-rifle cartridge and a Magazine (firearms), detachable magazine.C. Taylor, ''The Fighting Rifle: A Complete Study of the Rifle in Combat'', F.A. Moyer ''Special Forces Foreign Weapons Handbook'', R.J. Scroggie, F.A. Moyer ''Special Forces Combat Firing Techniques'', Musgave, Daniel D., and Thomas B. Nelson, ''The World's Assault Rifles'', vol. II, The Goetz Company, Washington, D.C. (1967): 1 Assault rifles were first put into mass production and accepted into widespread service during World War II. The first assault rifle to see major usage was the German StG 44, a development of the earlier Maschinenkarabiner 42(H), Mkb 42.''Firearms: The Life Story of a Technology'', by Roger Pauly. Greenwood Publishing Group. 2004. pp. 145–146 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osprey Publishing
Osprey Publishing is a British publishing company specializing in military history formerly based in Oxford. Predominantly an illustrated publisher, many of their books contain full-colour artwork plates, maps and photographs, and the company produces over a dozen ongoing series, each focusing on a specific aspect of the history of warfare. Their publications include the ''Men-at-Arms'' series, running to over 500 titles, with each book dedicated to a specific historical army or military unit. Osprey is an imprint (trade name), imprint of Bloomsbury Publishing. History In the 1960s, the Brooke Bond Tea Company began including a series of military aircraft cards with packages of their tea. The cards proved popular, and the artist Dick Ward proposed the idea of publishing illustrated books about military aircraft. The idea was approved and a small subsidiary company called Osprey was formed in 1968. The company’s first book, ''North American P-51D Mustang in USAAF-USAF Service'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torso
The torso or trunk is an anatomical terminology, anatomical term for the central part, or the core (anatomy), core, of the body (biology), body of many animals (including human beings), from which the head, neck, limb (anatomy), limbs, tail and other appendages extend. The tetrapod torso — including that of a human body, human — is usually divided into the ''chest, thoracic'' segment (also known as the upper torso, where the forelimbs extend), the ''abdomen, abdominal'' segment (also known as the "mid-section" or "midriff"), and the ''pelvic'' and ''perineum, perineal'' segments (sometimes known together with the abdomen as the lower torso, where the hindlimbs extend). Anatomy Major organs In humans, most critical Organ (anatomy), organs, with the notable exception of the brain, are housed within the torso. In the upper chest, the heart and lungs are protected by the rib cage, and the abdomen contains most of the organs responsible for digestion: the stomach, which breaks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Varmint Rifle
A varmint rifle or varminter is a type of small-caliber, precision-oriented long gun (firearm or high-powered airgun) primarily used for varmint hunting and pest control. Such rifles are typically characterized by sniper rifle-like designs such as heavy free-floating barrel, enhanced bedding, ergonomic gunstock, the use of bipod/ beanbag and high-power telescopic sight, and the choice of high- muzzle velocity, high- ballistic coefficient munitions, which are all accurizing features needed for improving repeated shooting, often over long distances. Both varmint hunting (which eliminates harassing outdoor nuisance animals collectively called varmints) and pest control (which removes infestations of destructive, often indoor pests) typically target animals that are difficult to eradicate by conventional hunting techniques due to their sheer numbers, burrowing or escape behaviors, camouflaging and defilading by the surroundings, or long alert distances that prevent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prairie Dog
Prairie dogs (genus ''Cynomys'') are herbivorous burrowing Marmotini, ground squirrels native to the grasslands of North America. There are five recognized species of prairie dog: black-tailed prairie dog, black-tailed, white-tailed prairie dog, white-tailed, Gunnison's prairie dog, Gunnison's, Utah prairie dog, Utah, and Mexican prairie dogs. In Mexico, prairie dogs are found primarily in the northern states, which lie at the southern end of the Great Plains: northeastern Sonora, north and northeastern Chihuahua (state), Chihuahua, northern Coahuila, northern Nuevo León, and northern Tamaulipas. In the United States, they range primarily to the west of the Mississippi River, though they have also been introduced in a few eastern locales. They are also found in the Canadian Prairies. Despite the name, they are not actually Canidae, canines; prairie dogs, along with the marmots, chipmunks, and several other Basal (phylogenetics), basal genera belong to the ground squirrels (Tribe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermin
Vermin (colloquially varmint(s) or varmit(s)) are pests or nuisance animals that spread diseases and destroy crops, livestock, and property. Since the term is defined in relation to human activities, which species are included vary by region and enterprise. The term derives from the Latin ''vermis'' ( worm), and was originally used for the worm-like larvae of certain insects, many of which infest foodstuffs. The term ''varmint'' (and ''vermint'') has been found in sources from c. 1530–1540s. Definition The term "vermin" is used to refer to a wide scope of organisms, including rodents (such as rats), cockroaches, termites, bed bugs, stoats, sables. Historically, in the 16th and 17th century, the expression also became used as a derogatory term associated with groups of persons typically plagued by vermin, namely beggars and vagabonds, and more generally the poor. Disease-carrying rodents and insects are the usual case, but the term is also applied to larger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
