Home / Accessory-Silencer Accessories / Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 View cart “Gemtech GM9 THREAD REAR MOUNT M18X1RH” has been added to your cart. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24$7895 Original price was: $7895.$7188Current price is: $7188. Out of stock SKU: YHM-3235-24 Category: Accessory-Silencer Accessories Product ID: 24701 Description Description 40 S&W Piston For Sidewinder Related products Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7895 Original price was: $7895.$7188Current price is: $7188. Sale! Dead Air Armament XENO MOUNT FLASH HIDER 1/2X28 $8900 Original price was: $8900.$8472Current price is: $8472. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7895 Original price was: $7895.$7188Current price is: $7188. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7895 Original price was: $7895.$7188Current price is: $7188.