Rugged Suppressors M2 Brake .338, Muzzle Brake, M18x1 Thread Pitch, Matte Finish, Black MB022 Rugged is bringing you a .338 and 8.6 Blackout compatible version of the lightweight M2 Brake. Rugged's M2 Brake features the Dual Taper Locking System. This is the perfect small brake for your Alaskan360 or Alaskan360Ti. Want to use this brake with your 1.375x24 threaded suppressor? No problem. Pair this M2 Brake with Rugged's R.U.M. (Rugged Universal Mount) and get your 8.6 Blackout or .338 fun going!