What they didn't have plenty of, was ammo. What ammo they did have, was limited to one box of ammo per caliber. That is to say, if you wanted two boxes of .22lr, you were out of luck, but if you wanted one box each of .22lr and .40 S&W, you could buy both.
Yes, you know the ammo shelves are really picked clean when even the 5mm Remington Rimfire is sold out.
Without bullets, a rifle is just an expensive, pretty club.