Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP View cart “Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH” has been added to your cart. Gemtech PISTON GM-45 LID USP$14800 Out of stock SKU: 12191 Category: Accessory-Silencer Accessories Product ID: 26717 Description Description GM-45/Blackside PistonFits HK USP 45 Pistols Related products Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Dead Air Armament XENO MOUNT FLASH HIDER 5/8X24 $8900 Original price was: $8900.$8472Current price is: $8472. Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 Original price was: $7495.$7135Current price is: $7135.