Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP View cart “Gemtech ADAPTER MM9 FTM 1/2-28” 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 45ACP 16X1LH $7495 Original price was: $7495.$7135Current price is: $7135. Sale! SilencerCo BRAVO ANCHOR BRAKE 458CAL BLK $9400 Original price was: $9400.$8606Current price is: $8606. Sale! Dead Air Armament GHOST FIXED MOUNT M13.5X1LH $8900 Original price was: $8900.$7865Current price is: $7865. Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 Original price was: $7495.$7135Current price is: $7135.