SilencerCo's 3-Lug Muzzle Device is compatible with .45 ACP and features a .578" x 28 thread pattern. This muzzle device allows for seamless operation with 3-lug quick detach style suppressors.Key FeaturesThread Pattern: Designed with a .578" x 28 thread pattern for compatibility with specific suppressors.Color: Finished in black for a sleek look.Safety: Functions as a silencer adapter, enhancing the effectiveness of compatible suppressors.