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The first version produced for commercial sale by Colt was the SP1 model AR-15 Sporter in .223 Remington, with a 20-inch (51 cm) barrel and issued with five-round magazines. [21] Initial sales of the Colt AR-15 were slow, primarily due to its fixed sights and carry handle that made scopes difficult to mount and awkward to use. [ 84 ]
The standard AR-15 rifle has a 500 mm (19.69-inch) sight radius. [15] 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 ...
ArmaLite Early ArmaLite AR-15 ultra-lightweight 'Hollywood' turned-down profile barrel, 1:14 twist only A1 : Also referred to as the "lightweight" or "pencil" profile. Government-specified barrel profile increased to between 0.675 and 0.575 inches
Any AR-15/AR-10 cartridge cases that are derived from the 7.62x51 can also be formed from these listed calibers. (7.62x51 & .308 are similar in external dimensions though the Brass has different internal capacity and Max PSI recommendations are different & Chambers are different.) AR-10 :The AR-10 is slightly larger and heavier than the AR-15 ...
The only major difference between the 601 and 602 is the switch from the original four grooves, right-hand 1:14-inch (1:355.6 mm or 64 calibers) rifling twist rate to the more common four grooves, right-hand 1:12-inch (1:304.8 mm or 54.8 calibers) twist. This was done as the original 1:14-inch twist rate to just stabilize the 55 grain bullet ...
The CAR-15 name was an attempt to re-associate the AR-15 name with Colt, since the AR initially stood for "Armalite Rifle" the original manufacturer of the Armalite AR-15. Colt later abandoned the CAR-15 concept, but continued to make carbine variations, using the "M16" brand for select-fire models and the "Colt AR-15" brand for semi-automatic ...
IWI Zion-15: IWI US: 5.56×45mm NATO United States: yes 2020-present IFAR 22: PT Republik Armamen Industri: 5.56×45mm NATO Indonesia: 2022 Ingram FBM: Fabrica Boliviana de Municiones: 5.56×45mm NATO Bolivia: 1990s INSAS rifle [14] Ordnance Factories Board: 5.56×45mm NATO India yes 1994–present Interdynamics MKR: Interdynamics: 4.5×26mm ...
The standard barrel has rifling of 1 turn in 9". [3] E2S Series: The basic E2S is fitted with a 16-inch carbine-style barrel. E2S Target [6] - 20" heavy-barrel target rifle with A2-style stock and carry handle upper, also available with 24" and 26" barrels. E2S Shorty [7] - 16-inch version with a "shorty" handguard. [6]