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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 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 ]
[1] In 2018, Small Arms Survey reported that there are over one billion small arms distributed globally, of which 857 million (about 85 percent) are in civilian hands. [2] [3] U.S. civilians alone account for 393 million (about 46 percent) of the worldwide total of civilian held firearms. [3] This amounts to "120.5 firearms for every 100 ...
20 in. A1 1:12 Yes A1 Birdcage 613P: M16 (License produced by Elisco Tools) A1 Triangular S-1-F A1 Yes No .223 REM 20 in. A1 1:12 Yes A1 Birdcage 614: M16A1: A1 Triangular S-1-F A1 No No .223 REM 20 in. A1 1:12 Yes A1 Birdcage 614S: M16S1 (Licence-produced by Chartered Industries of Singapore) A1 Triangular S-1-F A1 No No .223 REM 20 in. A1 1: ...
Other cartridges were derived from re-forming an existing case and possibly trimming the length in order to arrive at a case-shape that meets the standardized SAAMI-spec dimensions. AR-15 : 22 Nosler : Proprietary, uses the head and rim dimensions of the 5.56x45, and a case-body that is similar to the 6.8 SPC case.
The Colt AR-15 is a product line of magazine-fed, gas-operated, autoloading rifle manufactured by Colt's Manufacturing Company ("Colt") in many configurations. [1] The rifle is a derivative of its predecessor, the lightweight ArmaLite AR-15, an automatic rifle designed by Eugene Stoner and other engineers at ArmaLite in 1956.
The Roberti–Roos Assault Weapons Control Act of 1989 (AWCA) is a California law that bans the ownership and transfer of over 50 specific brands and models of firearms, which were classified as assault weapons. Most were rifles, but some were pistols and shotguns. The law was amended in 1999 to classify assault weapons by features of the firearm.
The rifle itself is offered in two variants: the S-5.56 A1 with a 19.9-inch barrel and 1:12 pitch rifling (1 turn in 305 mm), optimized for the use of the M193 Ball cartridge; and the S-5.56 A3 with a 20-inch barrel and a 1:7 pitch rifling (1 turn in 177, 8 mm), optimized for the use of the SS109 cartridge.