Home / Accessory-Silencer Accessories / Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28$7495 $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! Gemtech ADAPTER SIG MOSQUITO $4500 $4183 Sale! Rugged Suppressors OBSIDIAN45 3 LUG ADAPT 9/16X24 $8500 $7561 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 $7135 SilencerCo O-RING BOOSTER PACK $900