Home / Accessory-Silencer Accessories / Gemtech ADAPTER GM-45/BLACKSIDE 1/2-28 You cannot add "Gemtech PISTON GM-45 LID MK23" to the cart because the product is out of stock. Sale! Gemtech ADAPTER GM-45/BLACKSIDE 1/2-28$8500 $8444 Out of stock SKU: 12196 Category: Accessory-Silencer Accessories Product ID: 26726 Description Description For GM-45 SilencerRear Thread Adapter Related products Sale! Dead Air Armament KEYMO FLASH HIDER M14X1LH $8900 $8472 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 $7135 SilencerCo O-RING BOOSTER PACK $900