The USC (Universal Self-loading Carbine) was HK's civilian UMP derivative imported to the US with a thumbhole stock and 10-round magazine. Discontinued but highly sought for conversion potential. Type: Rifle Action: Semi-Automatic Caliber: 9mm Capacity: 10 Year introduced: 2000, Germany Weight: 80 oz Overall length: 35.4" Status: Discontinued Intended use: Collector, Range