Another very good one I forgot is seekings. They cut them OEM for spikes and others. If you are on a tight budget there are people out there that can hand pick a nice matched billet for you in the $200 range. In the end an AR is an AR. If it is up to spec and unless you are looking for some special feature or a high end competition, the brand really doesn't matter at all. What matters the most are the internals and a nice barrel according to your purpose. All this tacticool stuff will fade away and the good solid relentless shooters will always remain.
Those areros I got a few from them on a bulk buy for the "beat up the bushes" type of carbines and they are all squared and up to spec so they are good to go. Again branding doesn't mean anything. For example delton has been using the same M16 bolts they put in the colts. They are OEM cuts and the same mills serve several brands. We compared them side by side and they came with the same guts, even the same machine marks. Obviously like everyone when they run out of stock they go to the next OEM. Good luck.
Last Edit: Sept 25, 2012 20:04:36 GMT -8 by Deleted