The Angstadt Arms 3-Lug Flash Hider gives you the ability to quickly attach a sound suppressor without sacrificing flash mitigation and recoil management when shooting unsuppressed. Featuring a universal 3-lug interface, this 3-lug flash hider can quickly interface with any pistol caliber sound suppressor as well as the Angstadt Arms 3-Lug QD Blast Shield!FeaturesMade from hardened steel with a black nitride finishDoes not require the use of shims. Shims can be used if specific timing is desiredDo not use a crush washer