Shop › MIDWEST 30CAL MUZZLE BRAKE MIDWEST 30CAL MUZZLE BRAKE $33.95 Midwest Industries Muzzle Brake, 30 Caliber, 5/8X24 Thread, Phosphate Finish, Includes Crush Washer MI-AR30MB1 Quantity: Add To Cart Added! Midwest Industries Muzzle Brake, 30 Caliber, 5/8X24 Thread, Phosphate Finish, Includes Crush Washer MI-AR30MB1