Due to small barrel, the vehicle-15 SMGs suffered from the loud and bright muzzle blast, and quite a few muzzle units were made to lower this. The SMGs were initially equipped with the typical M16 rifle's "duckbill" or a few-prong flash hiders, which didn't relieve the issue. In September 1966, Colt produced a three.5-inch (89 mm) lengthy moderato… Read More