Colt's exciting, new, M4/M16 are dedicated to the .22 Long Rifle.
Since its inception, the M16/AR-15 family of Colts has challenged arms designers to develop reliable .22 Long Rifle conversion units to take advantage of the rifle's .22-caliber bore and the abundance of inexpensive .22 rimfire ammunition.
Colt itself marketed one of the earliest, years ago, followed by John Foote of the simple blowback units that replaced the Maremont Corp., who designed the unit
5.56 bolt assembly. Max Atchisson of adopted by the US Army as the M261.
the Military Armament Corp. developed Only Canada fielded a fully dedicated a similar unit commercially popular .22 rimfire model, known as the C10,
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