Home / Accessory-Silencer Accessories / CGS Group PISTON 1/2X28 BLACK You cannot add "Gemtech PISTON GM-45 LID MK23" to the cart because the product is out of stock. Sale! CGS Group PISTON 1/2X28 BLACK$5500 $5335 Out of stock SKU: CGS-KRK-1/2X28PISTBK Category: Accessory-Silencer Accessories Product ID: 32848 Description Description Fits Kraken/MOD9/Nautilus17-4PH Stainless Steel Related products Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! Rugged Suppressors OBSIDIAN45 3 LUG ADAPT 9/16X24 $8500 $7561 Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 $7135 Gemtech THREAD PROTECTOR 1/2-28 RF $1800