That was the UMP in 10MM (Universale Maschinenpistole) vs the MP5, I had used a 40 S&W version that was a great "tool". It was a modular weapon system so it broke down fairly easy. Very accurate and a joy to shoot with the collapsible stock. Slower rate of fire for a full auto but it did fine by me! The UMP was the next generation of the MP5.
HK had produced the USC (Universal Self loading Carbine) for civilians to purchase and they could have been made into a UMP if you paid the NFA Tax. Unfortunately HK stopped selling them to the general public.
No, he's right. They made an MP5 in 10mm. Dubbed the MP5/10 it was made for the FBI and I believe DOE's NEST teams used them
