THE 2-MINUTE RULE FOR COLT M4 MAGPUL

As a result of shorter barrel, the CAR-15 SMGs experienced from the loud and bright muzzle blast, and quite a few muzzle units have been produced to scale back this. The SMGs had been at first equipped Using the common M16 rifle's "duckbill" or a few-prong flash hiders, which did not alleviate the trouble. In September 1966, Colt created a three.5-