Originally Posted by notorious
Can't go wrong with Stag or Rock River.
I am an Armalite guy, but some of their AR's are overpriced.
For a budget build AR, Palmettostatearmory.com has some decent but very cheap 16" uppers, $79 lowers and cheap trigger kits. I would break one in with 1000 rounds before I consider it life/death reliable, though.
M & A parts have good kits but they don't sell lowers. I built a 24" bull from them with a Rock River two-stage trigger and it is VERY accurate.
I am not cheap or anything and not on any sort of a budget but seriously I am very private when it comes to things like guns and money locally, I will check out some of those you pointed out...