Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID USP You cannot add "SIG SAUER FLASH HIDER CL 5.56MM 25 DEG #" 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! SIG SAUER FLASH HIDER CL 5.56MM 90 DEG $17999 $16957 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 $7135 Sale! Rugged Suppressors TITANIUM FRONT CAP 7.62 $10000 $8715 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042