It wasn't NEA, it was Rausch tactical. The nitrocarburizing wasn't done properly and the receivers were softened. The points where the locking block engaged deformed causing excess headspace, then, eventually it stopped the bolts fore and aft travel. The finish on the barrel lived up to the promise of corrosion resistance, but that's all. I have a like new rifle with 600 rds down the pipe that is cooked.
The guy who did the work never had the decency to return my attempts to contact him.
Thanks for nothing Sean Rausch.