I just inspected a factory built Delton yesterday. The gas key screws failed the reverse torque test, I had to replace and stake.....the gas block screws were loose and the buffer tube threads were jacked up. Just my recent observations.
Interestingly, it had one stake on the castle nut( I was surprised to see that) but I had to pull the castle nut off to replace the end plate, and the castle nut was just barely tight.
Interestingly, it had one stake on the castle nut( I was surprised to see that) but I had to pull the castle nut off to replace the end plate, and the castle nut was just barely tight.