Had to think on this one for a while. I'm not a lover of the AR platform. I must say, though, I'm slowly building my own. I figured it would be in my best interest to at least become familiar with them for reasons which we do not speak on TFL. My very limited knowledge base along with nary a mention of the brand here has me thinking I better be careful and say it is my favorite and not necessarily the best (I know, you didn't ask what we thought the best one, is.).
Mine is an LMT. They started with gov contracts making AR parts and eventually started selling to the public. At one time, I lived a stone's throw from their manufacturing facility and lean towards buying local. Their fit/finish seems to rival Rock River, Bravo, POF, etc. I could be dead wrong. Again, I'm no expert on the platform. But I buy what's my favorite and that's one of them in the stable.