Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP You cannot add "Gemtech PISTON GM-45 LID MK23" to the cart because the product is out of stock. 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! SilencerCo 3-LUG MUZZLE DEVICE 9MM 5/8X24 $8900 $8211 Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 $7135 Gemtech ADAPTER MM9 FTM 1/2-28 $7500