Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP View cart “Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24” 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. Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 SilencerCo O-RING BOOSTER PACK $900 Gemtech ADAPTER S&W M&P22C/22LR $6200