Shop › DEAD AIR GHOST PISTON 1/2X28 DEAD AIR GHOST PISTON 1/2X28 $89.00 Dead Air Armament Ghost Piston, 1/2 x 28 RH, Black Finish DA401 Quantity: Add To Cart Added! Dead Air Armament Ghost Piston, 1/2 x 28 RH, Black Finish DA401