Because of the quick barrel, the vehicle-15 SMGs endured from a loud and bright muzzle blast, and quite a few muzzle equipment have been made to lessen this. The SMGs have been at first equipped with the typical M16 rifle's "duckbill" or a few-prong flash hiders, which did not relieve the trouble. In September 1966, Colt designed a 3.5-inch (89 mm… Read More