The Q Cherry Bomb XL Muzzle Brake, 8.6MM, M18x1.5RH is a Quickie XL Fast-Attach muzzle brake compatible with the PORQ CHOP and SHORT CHOP silencers by Q. It features our taper mount shoulder to align with our barrels and silencers, uses a 9/16 inch socket on the front for easy install and removal, and features 360 circumferential ports to alleviate the need for timing and shims. Backwards compatible with standard 90 degree shouldered barrels. The Cherry Bomb by Q is too short and NOT recommended for pinning and welding to a barrel. Product Specifications Weight: 3.2 Oz. Overall Length: 2.27 Material: 17-4 Stainless Steel Length Added To Barrel: 0.8 8.6 Blk Bore