Home / Accessory-Silencer Accessories / CGS Group PISTON 13.5X1LH BLACK View cart “Gemtech THREAD PROTECTOR 1/2-28 RF” 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! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 $7135 Sale! SilencerCo 3-LUG MUZZLE DEVICE 9MM 1/2X36 $8900 $8211 Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 $7135 Sale! SilencerCo BRAVO ANCHOR BRAKE 30CAL BLACK $9400 $8606