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Squad Automatic Weapon
A squad automatic weapon (colloquial: section automatic weapon [SAW]; light support weapon [LSW]) is a fully automatic firearm used to give infantry squads or sections a man-portable source of fully automatic firepower. Weapons used in this role are often selective fire rifles, usually fitted with a bipod and heavier barrel to perform as light machine guns. Squad automatic weapons usually fire the same cartridge as the assault rifles or battle rifles carried by other members of the unit. This reduces logistical requirements by making it only necessary to supply one type of ammunition to a unit
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Coordinate Axis
In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space. The order of the coordinates is significant, and they are sometimes identified by their position in an ordered tuple and sometimes by a letter, as in "the x-coordinate". The coordinates are taken to be real numbers in elementary mathematics, but may be complex numbers or elements of a more abstract system such as a commutative ring
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Gun Barrel
A gun barrel is a crucial part of gun-type ranged weapons such as 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 introduced (via propellant combustion or via mechanical compression) behind a projectile in order to propel it out of the front end (muzzle) at a high velocity. The hollow interior of the barrel is called the bore. The measurement of the diameter of the bore is called the caliber
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Shear Legs
Shear legs, also known as sheers, shears, or sheer legs, are a form of two-legged lifting device. Shear legs may be permanent, formed of a solid A-frame and supports, as commonly seen on land and the floating sheerleg, or temporary, as aboard a vessel lacking a fixed crane or derrick. When fixed, they are often used for very heavy lifting, as in tank recovery, shipbuilding, and offshore salvage operations
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M249
The M249 light machine gun (LMG), formerly designated the M249 Squad Automatic Weapon (SAW) and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the high rate of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel
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Sako TRG
The Sako TRG is a bolt-action sniper rifle line designed and manufactured by the Finnish firearms manufacturer, SAKO of Riihimäki. The TRG-21 and TRG-22 are designed to fire standard .308 Winchester /7.62×51mm NATO sized cartridges, while the TRG-41 and TRG-42 are designed to fire more powerful and dimensionally larger .300 Winchester Magnum (7.62×67mm) magnum and .338 Lapua Magnum (8.6×70mm) super magnum cartridges. They are available with olive drab green, desert tan/coyote brown, dark earth or black stocks, and are also available with a folding stock. The sniper rifles are normally fitted with muzzle brakes to reduce recoil, jump and flash. The Sako factory TRG muzzle brakes vent sideways and are detachable. Generally TRGs are outfitted with a Zeiss or Schmidt & Bender PM II telescopic sight with fixed power of magnification or with variable magnification
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Sling (firearms)
In the context of firearms, a sling is a type of strap or harness designed to allow a shooter to conveniently carry a firearm (usually a long gun such as a rifle, carbine, shotgun, or submachine gun) on his/her body, and/or to aid in greater hit probability by allowing the firearm to be better braced and stabilized during aiming
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KeyMod
KeyMod is a universal interface system for firearm accessory components designed to supersede the MIL-STD-1913 accessory rails. The concept was first created by VLTOR Weapon Systems of Tucson, Arizona, and released through Noveske Rifleworks of Grants Pass, Oregon, before being published in the public domain for adoption by the entire firearms accessory industry. The name "KeyMod" was coined by Eric Kincel (then working for VLTOR Weapon Systems) following the naming trend of other VLTOR accessories with the suffix "Mod" meaning modular, and "Key" being a reference to the key-hole profile of the m
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Dovetail Rail
A dovetail rail or dovetail mount can refer to several types of brackets found on firearms primarily for mounting sights. Dovetail rails usually refer to a dovetail running parallel to the bore (i.e. an 11 mm rail or a picatinny rail) to be used for mounting a scope or diopter sight to a rifle. These are sometimes also called "tip-off" mounts, and allow the user to easily take on or off the sight
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Weaver Rail Mount
A Weaver rail mount is a system to connect telescopic sights and other accessories to rifles, shotguns, pistols, and crossbows. It uses a pair of parallel rails and several slots perpendicular to these rails. The later Picatinny rail, developed by the US military, is a development of the key concepts of the Weaver system, and they are partly compatible.