You have to like the idea of a $65 stripped lower. Makes for a nice start on a cheap plinker. Mil spec is supposed to be mil spec.
Rguns has always treated me ok not great just ok. 6 1/2 out of 10. That's what worries me. What if your lower is scratched,dinged or worse. I have never had the greatest luck with there customer service.
Good luck and keep us posted. I'm very interested in hearing from other people who buy from the same people I do.