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The Armalite AR-15 is the parent of a variety of Colt AR-15 and M16 rifle variants. History After World War II, the United States military started looking for a single automatic rifle to replace the M1 Garand , M1/M2 Carbines , M1918 Browning Automatic Rifle , M3 "Grease Gun" and Thompson submachine gun .
ArmaLite, or Armalite, is an American small arms engineering company, formed in the early 1950s, in Hollywood, California.Many of its products, as conceived by chief designer Eugene Stoner, relied on unique foam-filled fiberglass butt/stock furniture, and a composite barrel using a steel liner inside an aluminum sleeve, including the iconic AR-15/M16 family.
The AR-15 was later adopted by United States military forces as the M16 rifle. [7] [8] After ArmaLite sold the rights to the AR-15 to the Colt Firearms Company, Stoner turned his attention to the AR-16 design. This was another advanced 7.62 mm rifle but used a more conventional short-stroke piston and a number of stamped parts to reduce cost.
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]
At closer ranges (typically inside 15–20 meters), the shooter must compensate by aiming high to place shots where desired. 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]
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Semi-automatic rifle version of the AR-18. AR-100 AR-101 AR-102 AR-103 AR-104: 5.56×45mm NATO: ArmaLite, Elitool: AR-100 series [4] based on the AR-16 that used a self ejecting magazine device. [5] Used in development of Ultimax 100 LMG. AR-30, AR-30A1, AR-31.308 Winchester, .300 Winchester Magnum, .338 Lapua: ArmaLite: Bolt-action rifle based ...