Product Description CNC Machined High Quality Steel Heat Treated AR15 Shark Muzzle Brake Side Ported And Ported On Top Solid Machined Construction Black Oxide Finish Reduced Back Pressure 1/2"x28 Pitch Overview Black oxide finish, solid precision machined construction. The AR muzzle brake will reduce recoil & climb which will improve shooting and control. The AR Shark muzzle brake redirects propellant gasses and reduces recoil and flash dramatically. Wraps around your threaded barrel and threads on 1/2"x28 thread pitch. Warranty All FSI accessories carry a 100% satisfaction guarantee against manufacturer's defects in original materials and workmanship. If your FSI accessory shows evidence of such defects, FSI will fix, repair, or replace your accessory at the most cost effective manner possible. FSI does not warranty products or damage caused to our products as a result from improper installation or incorrect installation of other manufacturers' products. Be sure to keep your sales ticket or receipt as proof of purchase date when making a claim.