The UMP 9 is the 9mm variant of the UMP submachine gun, offering the lowest recoil and highest magazine capacity of the UMP family. It was developed for markets and agencies that standardize on 9mm across all platforms. Less commonly adopted than the MP5 as the roller-delayed system's accuracy advantage was more pronounced in 9mm. Type: Submachine Gun Action: Short-Stroke Gas Piston Caliber: 9mm Capacity: 30 Year introduced: 2000, Germany Weight: 5 oz Overall length: 27.17" Status: Active Intended use: Law Enforcement, Special Operations