Nothing worked right in my Stag until aligned and tightened the gas block.
Now it shoots everything 95% of the time.
500 rounds of Norinco copper washed 7.62x51, 240 rounds Hirtenberger, 100 rounds of Barnes TTSX 168, and sad to admit, 50 rounds of Barnhaul.
Completely stock Gen 1 Mlok version of the Stag 10.
Uses both 10 round XCR metal mag as well as pinned 5 round pmag.
Weights 12.2 lbs, but I am afraid of putting lighter BCG, barrel, etc and then have to troubleshoot why it doesn't cycle properly.