I'm interested in building an AR. I've seen kits that you can buy. Does anyone know about J&T distributing, Blackthorne Products or Model 1 sales? They are very inexpensive. Are they junk or are they good? I'm not a Navy Seal or on a SWAT team so I don't have to have the best of the best, but at the same time I don't want a piece of junk. Hopefully someone has first hand knowledge of some of these companies.