I'm in the process of gathering info to build my own AR. It seems there are lots of decent kits. I am leaning towards some of the places with better customer service versus the best prices. One place I shop has a few different stripped lowers, CMMG, Double Star, and Superior Arms. There is a price difference that makes me wonder why one piece is better or worse the the other. I see others advertised on the lower end of the dollar scale but common sense says to question things. End goal is a bare bones, average accuracy, reliable, A2 'issue style' AR. Is there something I am missing with the specs on the lowers? Thanks.