THE ULTIMATE GUIDE TO COLT M4 MAGPUL

Due to the brief barrel, the CAR-fifteen SMGs endured from the loud and bright muzzle blast, and several muzzle equipment ended up formulated to lessen this. The SMGs have been originally equipped with the normal M16 rifle's "duckbill" or three-prong flash hiders, which didn't alleviate the situation. In September 1966, Colt designed a 3.five-inch