The new GEMTECH GM-9 is a culmination of over two decades of centerfire pistol suppressors. If familiar with our Tundra and Multimount suppressors, the GM-9 takes the best of both of them and puts it into one great package. The tube diameter is the standard 1.25″ and accepts all Multimount adapters. This suppressor is rated for subsonic 300 Blackout and total auto 9mm. GEMTECH offers a variety of mounts to adapt this suppressor to carbines, sub-guns, and pistols. It can be used with lesser calibers also and is completely user-serviceable. Lastly, the tube separates from the G-Core and can be easily cleaned, prolonging the life of the suppressor.