EXAMINE THIS REPORT ON COLT M4 MAGPUL

Because of the quick barrel, the CAR-15 SMGs experienced from a loud and bright muzzle blast, and several muzzle units were produced to scale back this. The SMGs had been to begin with fitted Using the standard M16 rifle's "duckbill" or three-prong flash hiders, which didn't reduce the situation. In September 1966, Colt produced a three.5-inch (89�