Rugged Suppressors 3 Port Brake .338, Muzzle Brake, M18x1 Thread Pitch, Matte Finish, Black MB026 Rugged took their 3 Port Muzzle Brake featuring the Dual Taper Locking System and beefed it up for the .338 and 8.6 rounds. This muzzle device is designed for reducing recoil when shooting unsuppressed. Compatible with Rugged's Alaskan360 or Alaskan360Ti. You can also use this brake with your 1.375x24 threaded suppressor when you pair it with Rugged's R.U.M. (Rugged Universal Mount).