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.223 REM 20 in. A1 1:12 Yes A1 Birdcage 605: Model 605: A1 Triangular S-1-F A1 No No .223 REM 15 in. A1 1:12 No Type 2 Duckbill 605A: Model 605A: A1 Triangular S-1-F A1 Yes No .223 REM 15 in. A1 1:12 No Type 2 Duckbill 605B Model 605B: A1 Triangular S-F-1-3 A1 No No .223 REM 15 in. A1 1:12 No Type 2 Duckbill 606 CAR-15 Heavy Assault Rifle M1 ...
In 1969, the M16A1 officially replaced the M14 rifle to become the U.S. military's standard service rifle. [83] [84] In 1970, the new WC 844 powder was introduced to reduce fouling. [85] Colt, H&R, and GM Hydramatic Division manufactured M16A1 rifles during the Vietnam War.
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]
M16A1 rifle ArmaLite AR-15. At the request of the U.S. military, Stoner's chief assistant, Robert Fremont along with Jim Sullivan designed the Armalite AR-15 from the basic AR-10 model, scaling it down to fire the small-caliber .223 Remington cartridge. The AR-15 was later adopted by United States military forces as the M16 rifle. [7] [8]
Colt's continued attempts to market the HBAR M16A1 as the Model 621 through the late 1970's without success and only a few dozen were manufactured. Colt's did eventually produce a heavy barrel civilian market semi-automatic AR-15 beginning in the late 1980's based on the M16A2 called the AR-15 HBAR that was a commercial success.
The .223 Remington (designated 223 Remington by SAAMI [4] and 223 Rem. by the C.I.P. [5], pronounced "two-twenty three") is a rimless, bottlenecked, centerfire intermediate cartridge. It was developed in 1957 by Remington Arms and Fairchild Industries for the U.S. Continental Army Command of the United States Army as part of a project to create ...
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.
Colt's first two models produced after the acquisition of the rifle from ArmaLite were the 601 and 602, and these rifles were in many ways clones of the original ArmaLite rifle (in fact, these rifles were often found stamped Colt ArmaLite AR-15, Property of the U.S. Government caliber .223, with no reference to them being M16s). [51]