Home / Accessory-Silencer Accessories / Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 View cart “Gemtech THREAD PROTECTOR 1/2-28 RF” has been added to your cart. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28$7495 Original price was: $7495.$7135Current price is: $7135. Only 1 left in stock Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 quantity Add to cart SKU: YHM-3225-28 Category: Accessory-Silencer Accessories Product ID: 24695 Description Description 45 ACP Piston For Sidewinder Related products Sale! Dead Air Armament GHOST FIXED MOUNT M13.5X1LH $8900 Original price was: $8900.$7865Current price is: $7865. Dead Air Armament SIG MOSQUITO THRD ADAPT 1/2X28 $4500 Sale! Rugged Suppressors OBSIDIAN45 3 LUG ADAPT 9/16X24 $8500 Original price was: $8500.$7561Current price is: $7561. Sale! Dead Air Armament XENO QD NOMAD MOUNT $13900 Original price was: $13900.$11895Current price is: $11895.