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4/14/2026 11:22:16 PM EDT
[Last Edit: sparky923][Edited]
The barrel flange appears to be thicker on the "bottom" and won't go into the use receiver. The flange hangs up on the receiver.
I thought all ump barrels were interchangeable?
4/15/2026 12:12:17 AM EDT
[#1]
Not going to be the answer for solving it, but I just recently saw a video where someone replaced a bunch of parts on an Omega build to get it running, and it ultimately turned out to be the thickness of the ramp that was the issue.

H&K UMP Clone Problems. How I got it 100% Reliable!
5/6/2026 11:12:57 PM EDT
[#2]
HDPS barrel and a MM barrel fit just fine.
Being willing to die to complete the mission didn't mean He's a pacifist, just tougher than nails. see also J3:16

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