Quote Originally Posted by georgeib View Post
The gas port sounds like it's good to go, size wise. Make sure there's nothing obstructing it, like metal shavings or debris. Then do the same for the gas tube, gas block, and gas key. Also perform the gas ring check on the BCG.
The weight of the bolt carrier precludes this. If you’re unsure replace the gas rings and be done.

He should put it back together lube the hell out of her and go shooting.