Home / Accessory-Silencer Accessories / Yankee Hill Machine Company SIDEWINDER PISTON 9MM 1/2X28 View cart “SilencerCo O-RING BOOSTER PACK” 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! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! SilencerCo BRAVO ANCHOR BRAKE 458CAL BLK $9400 Original price was: $9400.$8606Current price is: $8606. Sale! Rugged Suppressors OBSIDIAN PISTON 9/16×24 $8000 Original price was: $8000.$7196Current price is: $7196. Sale! Dead Air Armament WOLVERINE INSERT 15MM RH HK $8900 Original price was: $8900.$7865Current price is: $7865.