The Wolfman is already one of the best subgun silencers you can own. It's adaptable modular and dead quiet. The best and strongest way to mount it is with our KeyMicro adapter. With it there's no longer a need for the outdated technology of a 3-lug mount. You get a more robust quick attach method without the inherent issues of a 3-lug.While the Wolfman is optimized for pistol-caliber carbine platforms the KeyMicro adapter makes the Wolfman a great light-weight solution for your 5.56 carbine. Now they are available as a complete kit with a savings of over $200. The Wolfman KeyMicro Kit includes a 1/2-28 Keymicro Brake and KeyMicro adapter.Specifications: CALIBER RATING: 9mm 5.56 300BLK 7.62A-39 350 Legend .357 Mag ENERGY RATING: 2000 ft lbs BORE DIAMETER: 9mm LENGTH (LONG W/KEYMICRO ADAPTER): 8.75 inches LENGTH (SHORT W/KEYMICRO ADAPTER): 6.35 inches DIAMETER: 1.618 inches WEIGHT (LONG W/KEYMICRO ADAPTER): 19.2 ounces WEIGHT (SHORT W/KEYMICRO ADAPTER): 13.8 ounces MATERIALS: Fully welded 17-4 PH stainless steel FINISH: Cerakote(TM) USAGE: Extremely tough subgun silencer. We even rated it for carbine use when using the KeyMicro adapter and mount. BARREL RESTRICTIONS: None FULL AUTO RATED: Yes