Shop › FORTIS MUZZLE BRAKE 9MM 1/2X28 BLK FORTIS MUZZLE BRAKE 9MM 1/2X28 BLK $66.45 Fortis Manufacturing, Inc. Muzzle Brake, 9MM, 1/2X28, Black Finish 9MM-MB-BLK-28 Quantity: Add To Cart Added! Fortis Manufacturing, Inc. Muzzle Brake, 9MM, 1/2X28, Black Finish 9MM-MB-BLK-28