Tactical Outfitters builds the best ARs (north of Prattville) and if you have a problem with it he will fix it. If you use them like I do, as tools, they get lots of use and eventually something is going to need some repair. I would never buy a high dollar tool at a big box store.
I don't have the experience with AR's that a lot here do, but I have one of his and I don't baby it by any means, and it still works flawlessly and shoots better than I can.