Our ultra lite-weight, free-indexing two port muzzle brakes are not only attractive but also highly effective at reducing felt recoil and muzzle flip, resulting in faster target re-acquisition for those needed follow-up shots. The first port in our brakes have intigraded foils to roll the expanding gases against the port face to harness and promote counter forces to further mitigate the recoil pulse.These brakes are CNC machined from 17-4 stainless steel, heat treated and coated with a durable Cerakote finish. We currently manufactures these the following calibers: .338, .30, 7mm and 6.5mm. When ordering you need to select the barrel thread size and caliber. These brakes will fit barrels with a muzzle diameter of .975" and under.