Probably many (most?) of us already have at least one gun in each of these calibers anyway. So this new gimmick is pointless. They must be marketing it to the one-gun-solution type of buyer. But if I only had one gun, this thing certainly would not be it.

But there's good news on the horizon: If you really want one of these things, you can probably depend on the type of person who would actually buy one being the same type of person that would end up as road kill in the first wave of any attack. Then you could scavenge it off of them.