The Cherry Bomb by Q is a Quickie Fast-Attach muzzle brake compatible with the THUNDER CHICKEN and trash PANDA silencers by Q. It features our taper mount shoulder to align with our barrels and silencers, uses a 1/2 inch socket on the front for easy install and removal, and features 360deg circumferential ports to alleviate the need for timing and shims. Backwards compatible with standard 90 degree shouldered barrels. SPECS WEIGHT: 2.0 oz. OVERALL LENGTH: 1.64 inches MATERIAL: 17-4 Stainless Steel LENGTH ADDED TO BARREL: 0.8 inches THREADS: 1/2-28 (7.62mm BORE) 5/8-24 (7.62mm BORE) 1/2-28(9mm BORE) DO NOT shoot 9mm through a 7.62 silencer! Note: The 9mm Cherry Bomb(TM) does not have a taper on the inner threads of the brake.