Nice but had some issues - Aero Precision M4E1 AR-15 16in 5.56 Mid Barrel Complete Upper Receiver with Flash Hider

First shots on a range and after the 2nd bullet the gun refused to cycle the next round, took it into a gun professional and he took it apart, found the gas tube was miss aligned and the gas block as well in opposite directions. Took about an hour to re align those and the gun started firing for about 50 shots, then the issue re appeared. Another trip to the pro and replacing the block+tube and the gun now finally fires with no issues. Overall I think this issue was one of those "one offs" it is nice and feels good to shoot, easy for attachments and matches their lower well. I would recommend to buy it, just check that everything is aligned correctly!