Home / Accessory-Silencer Accessories / Dead Air Armament GHOST PISTON 1/2X28 Sale! Dead Air Armament GHOST PISTON 1/2X28$8900 Original price was: $8900.$7865Current price is: $7865. Out of stock SKU: DA401 Category: Accessory-Silencer Accessories Product ID: 34508 Description Description Related products Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 Original price was: $7495.$7135Current price is: $7135. Gemtech PISTON GM-45 LID MK23 $14800 Gemtech PISTON GM9/MM9/TUNDRA 1/2-28 $8000 Sale! Gemtech ADAPTER SIG MOSQUITO $4500 Original price was: $4500.$4183Current price is: $4183.