Home / Accessory-Silencer Accessories / CGS Group PISTON 13.5X1LH BLACK View cart “Gemtech GM9 THREAD REAR MOUNT M18X1RH” has been added to your cart. Sale! CGS Group PISTON 13.5X1LH BLACK$5500 $5335 Out of stock SKU: CGS-KRK-13.5X1LHBK Category: Accessory-Silencer Accessories Product ID: 30543 Description Description Fits Kraken/MOD9/Nautilus17-4PH Stainless Steel Related products Sale! SilencerCo BRAVO ANCHOR BRAKE 30CAL BLACK $9400 $8606 Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 $7135 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI $8900 $8351