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Bor Rifle
The Bor is a Polish bolt-action 7.62×51mm NATO and .338 Lapua Magnum caliber sniper rifle. The weapon received the code name Alex during development, after the name of the lead designer Aleksander Leżucha, creator of the .50 BMG, 12.7×99mm NATO WKW Wilk, Wilk anti-materiel rifle. After the development phase, the rifle received the military designation 'Bor'. Development After 1999, when Poland became a member of the North Atlantic Treaty Organization, there was a need for new firearms for the Polish Armed Forces compatible with NATO standards. Starting in the early 2000s, at the Mechanical Equipment Research and Developing Centre (''Ośrodek Badawczo Rozwojowy Sprzętu Mechanicznego'' – OBR SM) in Tarnów, engineer Aleksander Leżucha started his work on a new standard sniper rifle. The work on the Alex had financial backing of the Polish Science Research and Information Technology Ministry in a joint venture construction with the manufacturer OBR SM Tarnów. It is intended t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leupold & Stevens
Leupold & Stevens, Inc. is an American manufacturer of telescopic sights, red dot sights, binoculars, rangefinders, spotting scopes, and eyewear located in Beaverton, Oregon, United States. The company, started in 1907, is on its fifth generation of family ownership.Leeson, Fred (November 17, 1996). "All in the family". ''The Oregonian''. History Leupold & Stevens was founded by the German immigrant Markus Friedrich (Fred) Leupold and his brother-in-law Adam Voelpel in 1907, under the name Leupold & Voelpel. At the time, the company specialized in the repair of survey equipment. In 1911, Leupold & Voelpel was contracted by John Cyprian (J.C.) Stevens to manufacture a water level recorder he had designed and patented. After the initial success of the product, he was made partner in 1914 and the company was renamed Leupold, Voelpel, and Co.Stevens, John Cyprian. ''The Autobiography of a Civil Engineer'', published 1959. Besides the first water level recorder, the company invented ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SVD (rifle)
The SVD (СВД; ), GRAU index 6V1, is a semi-automatic designated marksman rifle/sniper rifle chambered in the 7.62×54mmR cartridge, developed in the Soviet Union. History The SVD was designed to serve in a squad support role to provide precise long-range engagement capabilities to ordinary troops following the Warsaw Pact adoption of the 7.62×39mm intermediate cartridge and assault rifles as standard infantry weapon systems. At the time, NATO used battle rifles chambered for the 7.62×51mm NATO fully powered cartridge as standard infantry weapon systems and had not yet adopted an intermediate cartridge and assault rifle of their own, allowing them to outrange their Warsaw Pact counterparts. The SVD was developed through 1958–1963 and selected as the winner of a contest that included three competing groups of designers, led by Sergei Simonov (prototype rejected in April 1960), Aleksandr Konstantinov, and Yevgeny Dragunov. Extensive field testing of the rifles conducted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alex Rifle (Poland)
The Bor is a Polish bolt-action 7.62×51mm NATO and .338 Lapua Magnum caliber sniper rifle. The weapon received the code name Alex during development, after the name of the lead designer Aleksander Leżucha, creator of the 12.7×99mm NATO Wilk anti-materiel rifle. After the development phase, the rifle received the military designation 'Bor'. Development After 1999, when Poland became a member of the North Atlantic Treaty Organization, there was a need for new firearms for the Polish Armed Forces compatible with NATO standards. Starting in the early 2000s, at the Mechanical Equipment Research and Developing Centre (''Ośrodek Badawczo Rozwojowy Sprzętu Mechanicznego'' – OBR SM) in Tarnów, engineer Aleksander Leżucha started his work on a new standard sniper rifle. The work on the Alex had financial backing of the Polish Science Research and Information Technology Ministry in a joint venture construction with the manufacturer OBR SM Tarnów. It is intended that this sniper r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minute Of Arc
A minute of arc, arcminute (abbreviated as arcmin), arc minute, or minute arc, denoted by the symbol , is a unit of angular measurement equal to of a degree. Since one degree is of a turn, or complete rotation, one arcminute is of a turn. The nautical mile (nmi) was originally defined as the arc length of a minute of latitude on a spherical Earth, so the actual Earth's circumference is very near . A minute of arc is of a radian. A second of arc, arcsecond (abbreviated as arcsec), or arc second, denoted by the symbol , is a unit of angular measurement equal to of a minute of arc, of a degree, of a turn, and (about ) of a radian. These units originated in Babylonian astronomy as sexagesimal (base 60) subdivisions of the degree; they are used in fields that involve very small angles, such as astronomy, optometry, ophthalmology, optics, navigation, land surveying, and marksmanship. To express even smaller angles, standard SI prefixes can be employed; the milliar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 position in its optical system to provide an accurate point of aim. Telescopic sights are used with all types of systems that require magnification in addition to reliable visual aiming, as opposed to non-magnifying iron sights, reflector (reflex) sights, holographic sights or laser sights, and are most commonly found on long-barrel firearms, particularly rifles, usually via a scope mount. Similar devices are also found on other platforms such as artillery, tanks and even aircraft. The optical components may be combined with optoelectronics to add night vision or smart device features. History The first experiments directed to give shooters optical aiming aids go back to the early 17th century. For centuries, different optical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Picatinny Rail
The 1913 rail (MIL-STD-1913 rail) is an American rail integration system designed by Richard Swan that provides a mounting platform for firearm accessories. It forms part of the NATO standard STANAG 2324 rail. It was originally used for mounting of telescopic sights atop the receivers of larger caliber rifles. Once established as United States Military Standard, its use expanded to also attaching other accessories, such as: iron sights, tactical lights, laser sights, night-vision devices, reflex sights, holographic sights, foregrips, bipods, slings and bayonets. An updated version of the rail is adopted as a NATO standard as the STANAG 4694 NATO Accessory Rail. History Attempts to standardize the Weaver rail mount designs date from work by the A.R.M.S. company and Richard Swanson in the early 1980s. Specifications for the M16A2E4 rifle and the M4E1 carbine received type classification generic in December 1994. These were the M16A2 and the M4 modified wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bipod
A bipod is a V-shaped portable attachment that helps support and steady a device, usually a weapon such as a long gun or a mortar. The term comes from the Latin prefix and Greek root , meaning "two" and "foot" respectively. Bipods are designed to support the weight of the weapon's front portion and barrel, and provide significant stability against unwanted side-to-side movements (i.e. canting) while allowing free movements pivoting around the transverse axis ( pitching). Most modern bipods have foldable and/or telescoping legs, and allow some limited movements around the vertical axis (panning) and even the longitudinal axis ( tilting). A bipod by itself, with only two supporting legs, is not completely stable and needs to be reinforced by at least one more point of support to be steady, especially against the horizontal shearing force from recoils. This third point of support is typically the buttstock that is firmly pushed/braced against the shooter's body, but can a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle Flip
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Muzzle may refer to: * Muzzle (anatomy) or snout, the projecting parts of the face (including the nose and mouth) of an animal ** Muzzle (mouth guard), a device that covers an animal's snout * Muzzle (firearms), the mouth of a firearm * Muzzle (band), a band based in Seattle, Washington, U.S. * "Muzzle" (song), a song by the Smashing Pumpkins from ''Mellon Collie and the Infinite Sadness'' * Muzzle, a character in '' Road Rovers'' * Muzzle ''(Ninjago)'', a character in ''Ninjago'' * ''Muzzle'' (film), a 2023 film starring Aaron Eckhart See also * Flash suppressor * Muzzle booster * Muzzle brake * "Muzzle #1", a song by The Whip * Muzzle law (other) * Muzzle shroud A muzzle shroud, linear compensator, blast shield, forward blast diverter or concussion reduction device (CRD) is a sleeve (either circular or otherwise) that attaches to and extends beyond the Muzzle (firearms), muzzle of a firearm in order to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle Brake
A muzzle brake or recoil compensator is a device connected to, or a feature integral (ported barrel) to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted muzzle rise. Barrels with an integral muzzle brake are often said to be ported. The concept of a muzzle brake was first introduced for artillery. It was a common feature on many anti-tank guns, especially those mounted on tanks, in order to reduce the area needed to take up the strokes of recoil and kickback. They have been used in various forms for rifles and pistols to help control recoil and the rising of the barrel that normally occurs after firing. They are used on pistols for practical pistol competitions, and are usually called compensators in this context.STI article o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gun Barrel
A gun barrel is a crucial part of gun-type weapons such as small arms, small firearms, artillery pieces, and air guns. It is the straight shooting tube, usually made of rigid high-strength metal, through which a contained rapid expansion of high-pressure gas(es) is used to propel a projectile out of the front end (muzzle (firearms), muzzle) at a high velocity. The hollow interior of the barrel is called the bore, and the diameter of the bore is called its calibre, usually measured in inches or millimetres. The first firearms were made at a time when metallurgy was not advanced enough to cast tubes capable of withstanding the explosive forces of early cannons, so the pipe (often built from staves of metal) needed to be braced periodically along its length for structural reinforcement, producing an appearance somewhat reminiscent of storage barrels being stacked together, hence the English name. History Gun barrels are usually made of some type of metal or Alloy, metal alloy. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluting (firearms)
Fluting is the removal of material from a cylindrical surface in a firearm, usually creating grooves. This is most often the barrel of a rifle, though it may also refer to the cylinder of a revolver or the bolt of a bolt action rifle. In contrast to rifle barrels and revolver cylinders, rifle bolts are normally helically fluted, though helical fluting is sometimes also applied to rifle barrels. Purpose The main purpose of fluting is to reduce weight, and to a lesser extent increase rigidity for a given total weight or increase surface area to make the barrels less susceptible for overheating for a given total weight. However, for a given diameter, while a fluted barrel may cool more quickly, a non-fluted barrel will be stiffer and be able to absorb a larger amount of total heat at the price of additional total weight. In barrel chamber In the barrel chamber, fluting refers to gas relief flutes/grooves used to ease the extraction of cartridges. They may also come in annu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bullpup
A bullpup firearm is one with its firing grip located in front of the Chamber (firearms), breech of the weapon, instead of behind it. This creates a weapon with a shorter overall length for a given barrel length, and one that is often lighter, more compact, concealable, and more maneuverable than a conventionally configured firearm. Where it is desirable for troops to be issued a more compact weapon, the use of a bullpup configuration allows for barrel length to be retained, thus preserving muzzle velocity, range, and ballistic effectiveness. The bullpup concept was first tested militarily in 1901 with the British Thorneycroft carbine, but it was not until the Cold War that more successful designs and improvements led to wider adoption. In 1977, the Austrian Federal Army, Austrian Army became the first military force in the world to adopt a bullpup rifle, the Steyr AUG, as a service rifle, principal combat weapon. Since then the militaries in many countries have followed suit w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
