Home / Accessory-Silencer Accessories / Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28 View cart “Rugged Suppressors OBSIDIAN45 3 LUG ADAPT 9/16X24” has been added to your cart. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28$7495 Original price was: $7495.$7135Current price is: $7135. Only 1 left in stock Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28 quantity Add to cart SKU: YHM-3245-28 Category: Accessory-Silencer Accessories Product ID: 32170 Description Description 9mm Piston For Sidewinder Related products Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 Original price was: $6900.$6042Current price is: $6042. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 Original price was: $7495.$7135Current price is: $7135. Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Sale! Dead Air Armament XENO MOUNT FLASH HIDER 5/8X24 $8900 Original price was: $8900.$8472Current price is: $8472.