I would bet that was before November 2008. In the year or a bit more following that, Americans bought enough firearms to equip both the Chinese and Indian armies, the two largest in the world. Sure many of those were handguns, some where .22 plinkers.. but many were not. They were AR-15s, high powered rifles, most with scopes, and a few were .50 caliber rifles. Ammunition sales are still backlogged, at least for the more popular calibers, and some less popular ones. (Anyone know where I can get some .45 Colt without waiting months for it? :) )
I hate to tell you how long I to wait for my AR *Kit* to arrive. The receiver was the easy part. :)
At the moment, practically every American who wants a firearm, owns one. If that ever changes such that even more want one, they can have one out of current supply. Heaven help whoever made them want one.
There is a social dynamic there that is grossly underexplored. In Great Britain at the moment a 300-lb drugged-up hooligan can break down any door he likes and take whatever he wants, secure in the knowledge that the justice system is more likely to make excuses for him than prosecute him. In the United States a 12-year-old girl can blow his sorry butt back out the door with Daddy's shotgun. She doesn't want to, and pray she never has to, but she can. That is civilization, in my opinion, and cowering behind a door hoping that he chooses someone else is barbarism. My European friends disagree. I fervently thank God I'm not one of them.