The largest retailer in the world also sells sporting goods, Wal-Mart.
Yes, many Wal-Mart's sell evil black guns.
Most Wal-Mart's sell a 6920 Colt M4 about twice a month as of late. Few are coming in, because so many of us are buying them, the distributors are sold out. But because of their buying power, more are squeaking through their doors, than anywhere else.
Want a Colt? Make friends with the sporting goods manager at Wal-Mart, and be in his department as he opens the gun locker in the back, and stocks shelves. This is typically at 7am. If you don't piss him off (not an easy task, being under feet daily), in a couple weeks, you will have a new Colt for $1097.97 in most stores. Great deal in this turmoil.
Is a mil spec AR really better as a semi auto? Most people would never know the difference. However, when a mil spec is the only riffles you can find anyway, stamped Colt, and the price is great, all indicators point to getting one.