Radical Firearms is a local shop on the outskirts of Houston. Started off small but have since exploded and mainly manufacture for stores now as most of their business are dealers who carry their products. Like Primary Arms and Joe Bob Outfitters to name a few. They are not bad for the price and pride themselves on quality. I've visited them a few times and actually have a pistol upper from them which has been spot on from day one. There are also so many AR companies out there it's hard to track them all. I only know of them cause they're close to me and have actually been to their brick and mortar place. Nice ppl who know their stuff.