Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP 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! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 Original price was: $6900.$6042Current price is: $6042. SilencerCo O-RING BOOSTER PACK $900 Gemtech PISTON GM9/MM9/TUNDRA 1/2-28 $8000 Gemtech ADAPTER MM9 FTM 1/2-28 $7500