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The AR-15 is nominally chambered in .223 Remington or 5.56×45mm NATO, with the .223 Wylde chamber allowing for the safe chambering of both, but many variants have been produced in different calibers such as .22 LR (sometimes referred to as an AR-22 [59]), 7.62×39mm, 9×19mm Parabellum, [60] 6.5mm Grendel, and shotgun calibers. [61]
The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [ 1 ]
The Ruger AR-556 is a semiautomatic AR-15 style rifle manufactured by U.S. firearms company Sturm, Ruger & Co. Introduced in 2014 as an entry-level AR-15 using a direct impingement action, with variants since being released such as the upgraded AR-556 MPR (multi-purpose rifle) in 2017 [1] and the AR-556 pistol in 2019.
The SR-556 is a semi-automatic AR-15 style rifle manufactured by Sturm, Ruger & Co. The rifle was introduced in 2009 in .223 Remington/5.56×45mm NATO and as a .308 Winchester AR-10 variant in 2013, the SR-762. [4] It is one of several AR-15 rifles to use a gas piston operation.
AR-15 Lightweight A2 Short Ribbed S-1 A2 Yes Yes .223 REM 5.56 NATO 16 in. A1 1:7 Yes A2 AR6551 AR-15 Target Model A2 Ribbed S-1 A2 Yes Yes .223 REM 5.56 NATO 20 in. A2 1:7 Yes A2 AR6601 AR-15 Match HBAR A2 Ribbed S-1 A2 Yes Yes .223 REM 5.56 NATO 20 in. HBAR 1:7 Yes A2 AR6700 AR-15 Competition HBAR A2 Ribbed S-1 Flattop Yes Yes .223 REM 5.56 NATO
CAR-15: Colt's Manufacturing Company: 5.56×45mm NATO.223 Remington United States: yes 1966-present CAR 816: Caracal International: 5.56×45mm NATO United Arab Emirates: yes 2014-present Carbon 15: Bushmaster Firearms International: 5.56×45mm NATO.223 Remington 9×19mm Parabellum United States: Chropi rifle: Chropei: 7.62×39mm Greece: no 1975 ...
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.
The company manufactures AR-15 style rifles chambered in .223 Remington/5.56×45mm NATO and AR-10 style rifles chambered in .308 Winchester and .260 Remington, among others. The company attracted attention within the firearms industry with its version of the AR-10, the Panther LR-308, earning Shooting Illustrated 's 2005 Golden Bullseye Award ...