Shop › RUGGED .338 3 PORT BRK M18X1.5 RUGGED .338 3 PORT BRK M18X1.5 $170.00 Rugged Suppressors 3 Port Brake .338, Muzzle Brake, M18x1.5 Thread Pitch, Matte Finish, Black MB027 Quantity: Add To Cart Added! Rugged Suppressors 3 Port Brake .338, Muzzle Brake, M18x1.5 Thread Pitch, Matte Finish, Black MB027