Obtaining a Federal Firearms License (FFL) is necessary if you want to sell guns to the public, order guns in bulk or conduct certain other gun-related transactions such as performing a background check on a potential retail gun buyer. The FFL is issued only by the Bureau of Alcohol, Tobacco and Firearms (ATF). Although firearms licenses are not issued automatically, they are not particularly difficult to obtain if you are serious about becoming a gun dealer or collector
Dillon's going to be a great press for you. Those things are really nice. A little envious of the blue team. I'm still loading on a Lee progressive. I've got it tweaked to work like clockwork, but it was a little tricky getting going. Dillons are precision machines.Just make sure to wear eye protection. Primers detonating is the only thing that scares me when I load.I'd recommend CCI primers most highly. I've chopped them up pretty good with my press and have yet (knock on wood) to have one pop on me. The worst is when a crimped primer case slips in the mix. New ones never want to seat.If you don't have a source for components, I recommend precision delta very highly for fmj bullets. You have to buy at least 2000 at a time, but you can mix and match. http://www.precisiondelta.com/
Another option if you know skilled people with CNC machine access is to try and get an 80% lower. This just means that the milling process is only 80% complete and is not designated as a firearm part by the ATF. That also means you are not required to use a FFL to buy them. Since the lower is the registered part of an AR15.
I understand the reason behind keeping your ammo supply consistent however it will add cost to your overall build.
Another thing to consider is to get a few 30 round mags while you still can. Right now Magpul the makers of the PMAG are trying to manufacture as many black 30 round mags as they can.
I spent a little time browsing gunbroker this morning.I think it's a little too late to buy a stripped lower. They're going for $250 or more, each. Whole ar rifles are going for well over 2x their regular retail prices.Apparently everyone is a little panicked.