Home / Accessory-Silencer Accessories / CGS Group PISTON 13.5X1LH BLACK View cart “SilencerCo O-RING BOOSTER PACK” has been added to your cart. Sale! CGS Group PISTON 13.5X1LH BLACK$5500 Original price was: $5500.$5335Current price is: $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! Dead Air Armament HUB DIRECT THRD MNT 5/8X24SIG $8900 Original price was: $8900.$8351Current price is: $8351. Dead Air Armament SIG MOSQUITO THRD ADAPT 1/2X28 $4500 SilencerCo DELTA 1/2X28 THREAD SPACER $1900 Sale! Dead Air Armament XENO MOUNT FLASH HIDER 5/8X24 $8900 Original price was: $8900.$8472Current price is: $8472.