The Masterpiece Arms MPA 9mm Defender is the MAC-10 pattern semi-automatic pistol in 9mm manufactured in the US. MPA produces the forward-charging side-charging design in their Georgia facility. The pistol-configuration (no stock) version is the most common US consumer format. It accepts 9mm MPA proprietary magazines or converted Sten magazines depending on configuration. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 30 Year introduced: 2010, USA Weight: 80 oz Overall length: 11" Status: Active Intended use: sporting, collecting