If you are building your AR-15 rifle this recoil compensator Tanker Style Muzzle Brake in 223, 5.56 1/2x28 thread pitch is the perfect upgrade for your AR rifle because it reduces felt recoil up to 30-40 percent depending on ammo used. This type of tanker muzzle brakes diverts all the forward the gasses to sides and top to lower muzzle rise and felt recoil keeping you on target. Length approximately 2 3/8" CNC machined hard anodized aluminum with matte black finish comes with crush washer. One year Limited warranty. Made In USA.