I bought this product from Ryan @ SFRC in November 2014. This is the first time I was able to get it to the range. I am new to AR and to NEA. The NEA x39 upper was new while the NEA lower was used off of CGN. It has an A2 butt stock And DPMS lpk internals. I installed Magpul flip up BUIS. The NEA felt solid, brake worked excellent and was fun to shoot. I think the NEA upper is a gen 2. It has a factory installed low gas block + 12" quad rail. Ryan included the 10 round XCR pistol mag made by ASC. I shot 140 rounds of Dominion brand (Canada Ammo) and it ran flawlessly. Zero issues. I'm impressed.
The upper mates well with the NEA lower. Though, I had difficulty mating this upper with my buddy's A2 lower due to take down pins being a hair big so I didn't want to force them in to the NEA upper.