11-15-2021, 05:45 AM
I have built 3 so far with 20” monster barrels. Plain non adjustable gas block, and carbine buffer setup. I have basically 3-4 boxes thru each rifle and the all operate flawless. Maybe had a few fte issues, within the first few shots but after that the all run great . Have u tried to message the feed lips on the magazines at all ??