Rugged Suppressors 3 Port Muzzle Brake featuring our Dual Taper Locking System(TM) and beefed it up for the .338 and 8.6 rounds. This muzzle device is designed for reducing recoil when shooting unsuppressed. Compatible with our Alaskan360(TM) or Alaskan360Ti(TM). You can also use this brake with your 1.375A-24 threaded suppressor when you pair it with our R.U.M. (Rugged Universal Mount).*timing shims included