Good luck man. The only other thing I could think of would be carbon deposit in the gas tube. maybe you could take it off and run something down it or some compressed air to see if there is a blockage but the 3 O'clock ejection says this isn't an issue.
I have mostly mid-length gas on all of mine except for the shorty upper I bought for my suppressed SBR build. I am going to break that upper down soon and install the adjustable gas block and quick attach for the suppressor soon. Hopefully I don't run into any gas issues........
I have mostly mid-length gas on all of mine except for the shorty upper I bought for my suppressed SBR build. I am going to break that upper down soon and install the adjustable gas block and quick attach for the suppressor soon. Hopefully I don't run into any gas issues........