The Cherry Bomb by Q is a quick attach muzzle brake compatible with the Thunder Chicken. It features a taper mount shoulder to align with barrels and silencers. Backwards compatible with 90 degree shouldered barrels. SpecificationsWeight: 2 oz. Overall Length: 1.64 inchesLength Added to Barrel: 0.8 inches Q Products Cherry Bomb, Muzzle Brake, 1/2-28 Q-CB-1/2-28