JK Armament's #1 most-requested accessory is now available! The JK HUB Piston Mount delivers reliable operation of JK 155 suppressors (plus other brands pistol suppressors!) on semi-automatic, centerfire pistols. Our booster is lightweight, compact, and competitively priced! Product Features By isolating the suppressor from the moving barrel, the JK HUB Piston Mount maintains reliable operation of short recoil-operated, semi-automatic pistols such as GLOCKs, SIGs, and nearly every other modern, centerfire pistol. The JK HUB Piston Mount installs in place of your JK 155 suppressor s taper mount or other mount accessory, threading directly into the base of the serialized suppressor tube with its HUB-standard 1-3/8 24 (1.375 24) thread pitch. This also makes the JK HUB Piston Mount compatible with any other suppressor on the market with HUB threads and enough internal length to accommodate the booster housing (approx 1.8 ). Reliable, compact, and affordable, the JK HUB Piston Mount is the best way to suppress your semi-auto pistol with your favorite JK 155 silencer or other HUB-compatible pistol or hybrid silencer and maintain proper function. Product Specifications Housing Material: 17-4PH Stainless Steel Piston Material: 17-4PH Stainless Steel Piston Cap Material: T6-7075 Billet Aluminum Piston Thread: 1/2-28 Length Added To Suppressor: .43" Weight: 4.5oz