Hello,
Finally finished making my conversion work!
I re-profiled the bolt and polished the hammer, carrier, bolt, and rails but was still not able to get the low brass to cycle.
Since I'd done everything else I had no choice but to take on the gas ports. It went relatively easy although I could have been a bit more considerate of the finish. My 4 ports were unobstructed but ~ 1/16th. I tried all 4 at 5/64 first - still FTE. Then took the two middle ones up to 3/16 - ding, ding, ding!
Zero FTE's with the cheap Federal stuff on MD 's 20 round drum at the #2 setting, and full FTE on the #