DA123 High quality components and precise manufacturing make Dead Air Armament parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on. Dead Air Armament Muzzle Brake, Black, 1/2X28, Fits Dead Air Xeno DA123 Details and Features: Thread Pattern: 1/2x28 tpi Type: Muzzle Brake Color: Black Fit: Dead Air Xeno