Compact pistol-format MPX with a 4.5-inch barrel. Gas-piston rotating bolt operation retained from the full MPX. Suppressor-ready with threaded muzzle. One of the most refined compact 9mm PDWs on the civilian market. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 30 Year introduced: 2016, USA Weight: 5.4 oz Overall length: 16.5" Status: Active Intended use: PDW / Law Enforcement / Suppressor Host