ADVANCED ARMAMENT COMPANY 64746 9mm Fits Aluminum/Steel Black
AACs A.S.A.P system allows the silencer to function properly with tilting barrel semi-automatic pistols. However, when used on fixed barrels hosts, the A.S.A.P system needs to be disengaged for proper function. The fixed barrel spacer replaces the driving spring to render the A.S.A.P System appropriate for use on fixed barrel hosts.