Shop › DEAD AIR THREAD SPACER 1/2X28 DEAD AIR THREAD SPACER 1/2X28 $19.00 Dead Air Armament Thread Spacer, 1/2 x 28 RH, Black Finish DA423 Quantity: Add To Cart Added! Dead Air Armament Thread Spacer, 1/2 x 28 RH, Black Finish DA423