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Rifles styled like the AR-15 come in many sizes and have many options, depending on the manufacturer. The lower receiver, without the receiver extension, rear takedown pin, and buttstock, is shown at bottom. An AR-15–style rifle is a lightweight semi-automatic rifle based on or similar to the Colt AR-15 design.
The LVOA-C is a direct gas-impingement (DGI) operated rifle based on the Colt AR-15. It features a proprietary full-length fore-end with an integrated muzzle brake/flash suppressor, which prevents the use of a suppressor due to size constraints. The rifle is used for close-quarters combat with low visibility operation applications (LVOA).
The AR-10 is slightly larger and heavier than the AR-15. It was originally designed to chamber the military 7.62x51 NATO cartridge (also .308), which has a COAL of 2.800" (71.12mm) 45 Raptor , uses the standard 7.62 NATO case, cut to a length of 1.800" from 2.015", resulting in a straight-wall cartridge, neck is sized to 0.452".
The Canadian company Colt Canada (formerly Diemaco) licensed production of a rifle (Colt Model 715) and carbine (Colt Model 725), but later went on to produce an entire line of AR-15/M16 pattern weapons developed independently. In May 2005, Colt's Manufacturing Company acquired Diemaco, and the name was changed to Colt Canada.
The AR-15 uses an L-type flip, aperture rear sight and it is adjustable with two settings, 0 to 300 meters and 300 to 400 meters. [16] The front sight is a post adjustable for elevation. The rear sight can be adjusted for windage. The sights can be adjusted with a bullet tip or pointed tool. The AR-15 can also mount a scope on the carrying handle.
A smaller version of the AR-10 and adopted by the United States military as the M16 rifle. Later developed by Colt into a popular semi-automatic Colt AR-15. AR-16: 7.62×51mm NATO: ArmaLite: Prototype battle rifle. ArmaLite AR-17: 12 gauge: Semiautomatic 12ga 2shot shotgun based on the earlier AR-9. AR-18: 5.56×45mm NATO
ArmaLite AR-18: ArmaLite: 5.56×45mm NATO United States: yes 1969-1985 ArmaLite AR-100: ArmaLite: 5.56×45mm NATO United States: Armtech C30R: Armtech Ltd: 5.56×45mm NATO (Quadrant with 3.56g standard M193 bullet, dimensions of the rectangular ammunition 35.7×15.8×9.5 mm) Australia: 1986 AS-44: 7.62×39mm Soviet Union: no 1944 AS Val ...
The AR-15 standard cartridge is a .223 caliber, frequently using bullets in the 55 to 77 gr weight range. The 300 BLK can be found in factory-loaded ammunition from 100 to 220 gr. Although, the solid .308 bullets that are lighter than 150 gr do not have optimum ballistic coefficients (hollow-point bullets can have an optimum profile at a ...