Feeding issue when bolt is locked to the rear

[Valjean]

Set that mag to the side and try some of your other mags. If the problem goes away. Then it is that mag, if it happens with moat are all of your other mags then it is something wrong with the internal parts are the lower is out of spec somehow.

Who's mag? ASC?Elander?CPD?

Who's lower?
Who's lower parts kit?
Who's upper?
Who's bcg?

The Mags are ACS and AR Stoner.

All of the other parts are PSA.