Stern Defense 9mm Muzzle Device, Black- SD CB9 MOD1

Manufactured to the highest quality standards right here in the U.S.A. Full auto tested to ensure that the compensator ports keep muzzle rise to a minimum. The twin chamber ports guarantee that every last bit of usable gas is utilized to kill recoil. Machined from US Mil-spec AISI 4140 steel and black nitride coated to provide a lifetime of abuse.Note: Comes with crush washer.Features:Full auto testedUS Mil-spec AISI 4140 steel.Sturdy construction.Black nitride coatingMade in U.S.A.9MMThreaded .5-36