Hey Dan, do you have this JP ultralight 9mm barrel,and if so, what do you think about it? View attachment 104530AR platform, JP is the only one that worked for me 100%.
Non-AR: Zenith, HK and B&T.
Hope that helps.
Seems the consensus is the colt mag ones are more reliable. AR15 style. That's what I went with. Ymmv.
I have a Foxtrot Mike FM9 for the price at cost if you're interested.
I decided to build one from Spikes lower and Gibbz side charging upper. I have had no issues