First two MUP’s completed and tested.

[Chwillbill68]

I completed my first two MUPs and took them to the range. They both worked great in my full size setup that I currently have. The mup laying out was the first one I built. After running 40 rounds or so with it I switched to the second mup I made. It ran flawlessly also. But if you look at the gap between the slide and grip module you can see the gap is wider at the front. It was very uniform with the first mup in the gun. I wonder if the front rails maybe were not bent down enough or if the take down hole was a little lowe.

For those that have built some of these, have you had this with any of your builds?

I have a 3.9 inch barrel, slide and spring, but didn’t have the grip module yet, which is why I had to try both mup’s in this full size set up.

I think the gap will look a little less if I put this one in the shorter set up, just have to wait till it gets here.

 

[One Ping Only]

Great job!!! I love that WC frame.... someday, somewhere I'm going to have to have a 320 clone.

 

[Red-f40]

Nice Job! I have found the mup-1 very satisfying to make.

 

[FrankenGlock]

Does the MUP have the same issues as the Sig 320 trigger group? Is this an upgraded version or just a copy of the original?

 

[Red-f40]

To my knowledge, all 320 FCU after market parts kits are the upgraded parts.

 

[AKfishwhisperer]

The sear is the upgraded part I am pretty sure. All other parts are the same.