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 SilencerCo O-RING BOOSTER PACK $900 Gemtech ADAPTER S&W M&P22C/22LR # $6200 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Yankee Hill Machine Company BLAST DEFLECTOR 5.56/30 CAL $9095 Original price was: $9095.$8412Current price is: $8412.