I already liked the video without having seen it. The slow rate of fire reminded me of the grease gun and I think that this is what full auto should be. Thanks Jason!
Thank you very much. I prefer the UMP45 followed by the UMP9 and then the UMP40 mostly because I shoot a ton of firearms in .45 and 9mm and not as much in .40. The UMP is incredibly controllable and allows you to easily keep rounds on target with the kind of reliability that you expect from HK.
HK doesn't, but you can check out Tommy Built Tactical owned by Tom Bostick, and see a few options for receivers and pistols with braces if you are looking for the look of a real UMP SMG. He builds some of the finest on the market.