If both parts (extractor and ejector) look good, then have you moved your mag block any? I’ve found with my RRA that there is a sweet spot where it works (a hair too high or low and the weapon malfunctions in either feeding or ejection).
I do Not have specific help but I have that exact upper and block.
Do Not overlook Anyting scrutinize Everyting. My upper had a loose barrel nut from
Colt factory. Hahn block dropped in my Anderson lower Tight as can be perfect alignment.
Mines been Perfect fmj Not jhp. I run 8oz buffer and std spring. Yes look at extractor closely
I did Not touch Hahn ejector. Could it be a timing issue if you are running lighter
Buffer??