Vega Force Company have posted details of their latest release on their Facebook page, a gas blow back MP5K. Full details are in the images below. This is listed as an “Asia Edition” which will be due to licensing issues. It’s as you’d expect for a replica, it includes a Umarex MP5 series lower grip and can be field stripped much like the real article:
No word on a PDW style stock for it, but you never know.