Does anyone by any chance have any experience with the KRISS Vector CRB/SO ? It's the civilian version of their KRISS Super V Vector SMG .45 ACP:
http://www.kriss-tdi.com/media/KRISS-TDI_Datasheet_CRBSO.pdf
http://www.kriss-tdi.com/media/KRISS-TDI_Datasheet_CRBSO.pdf