I've been talking with Dave from NEA I have to give him a tumbs up for communication and making me feel like he cares, but I guess we'll agree to disagree here.
NEA seems to blame my receiver. They say all the issues are caused by the barrel not being seated properly. That their barrel are a tight fit because they are mil spec parkerized, and it will get better with time.
The options offered to me are:
1- install the barrel with a mallet, and wear it out with time.
2- send my receiver to NEA to have their armorer install the barrel at no cost.
3- send them the barrel for refund.
Have I been told installation of the NEA barrel required a mallet, and the barrel required some kind of break in period because it fits too tight in and out I would not have bought it.
So I'll hope for a refund... Problem is, the barrel has to be in the condition it was shipped in. But the bolt caused some wear in the barrel extension where it was hanging. There is also the fact that if they judge the barrel is in spec (whatever their spec are) they will likely charge me 25% re-stocking fees.
Here's a iPhone pic of the wear (I'll take a better one before I ship the barrel back):
now we'll see what they have to say... And if I just lost time and sanity, or time sanity and money dealing with NEA.
If you were considering one I strongly suggest you reconsider. I'll never deal with them again myself.