HK USC to UMP .45 SBR (pre-owned)

Pre-owned in good condition. This gun started out as a 2005ish era HK USC but has been converted to a UMP using HK parts. The original upper was grey and dyed black. The result came out more like a dark brown. Includes many of the original parts, 16x1LH threaded HK barrel with CCF flash hider, factory HK pictogram lower with safe/semi/auto markings and eleven 25rd factory HK UMP "RESTRICTED" marked magazines and two mag couplers. Shows some wear from use, but the wear is not excessive and is in good condition for a 20+ year old gun. The original owner SBR'd this on a Form1 and and has his name/city/state engraved into the lower, but it was engraved in a way as to look like factory markings (see pic).