The Universal Cage Accessory can be used to run the Alaskan360 on 9mm pistols and sub guns. The Universal Cage Accessory comes with a cage spring retainer and multi-tool. Pistons in a variety of thread pitches are sold separately. - The Universal Cage Accessory allows for existing Obsidian 9mm mounting options (Booster Assemblies Fixed Mounts and 3-Lug Mount) to be use with the Alaskan360. - The multi-tool that is included with the Universal Cage Accessory uses a 11/16 inch hex to install the desired mounting option. (Rugged Suppressors recommends a torque of 25 ft-lb.)