The Masterpiece Arms MPA30T is a semi-auto pistol-caliber carbine inspired by the MAC-10 design, accepting Sten magazines in a legal rifle configuration with threaded barrel. Type: Semi-Auto Rifle Action: Blowback Caliber: 9mm Capacity: 30 Year introduced: 2010, USA Weight: 5.5 oz Overall length: 32" Status: Active Intended use: Home Defense, Plinking, Collector