Late yesterday afternoon I'm pleased to say this UMP40 will spit out anything I throw at it. Fired 150 rounds without one single issue of any kind. Interestingly, amoung several friends who were just in awe, the single comment that struck me was how they thought it was light in weight. They were amazed with the weight. While this does in fact weigh more than an MP5::::it's weight distribution is damn near perfect. Control is easy. There is barely any kick or muzzle flip. Recoil is felt but doesn't effect control. Easy to stay on target. So much so, we were shooting 1.5" rings at 30 yards as fast as we could pull the trigger. Overall...I just can't put this down long enough shoot anything else.
Thanks for the info guys... I may have to harvest parts from my USC to make one of these happen.
There are parts around. Ben at gatewood supply has parts already converted by Tom bostic. There are parts in the marketplace here on hkpro.
There is a list of parts needed to convert the 0-1-F and 0-1-2-F UMP lowers, or some use the SF without the catch.
Gatewood supply is who I went through and he was great to deal with, I couldn't be happier with what I got and his prices are pretty good. His kits are mostly all UMP parts so some will need to be modified, but he does have some of the 40 usc cut bolts already. And I was just curios if no one got the rails or not. I got my case delivered Saturday but no sign of them yet. I messaged top notch about it and it showed they read the message but never responded. another thing if anyone has the actual dimensions or plans to convert the ump to usc bolt I would love to get my hands on them and try the machining myself.
Last edited by M.Osborne89; 10-16-2017 at 02:27 PM.