Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP You cannot add "Rugged Suppressors OBSIDIAN9 3 LUG ADAPT 13.5x1L" 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 Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Sale! Rugged Suppressors OBSIDIAN PISTON 9/16×24 $8000 Original price was: $8000.$7196Current price is: $7196. Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 Original price was: $10000.$8715Current price is: $8715. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 Original price was: $7495.$7135Current price is: $7135.