"Other countries" are different from this country. It would be extremely difficult to implement any kind of ban here, given the number of illegal guns that are on the streets. The likely result would be that law-abiding owners would be criminalized for not wanting to part with their property, and criminals would still be armed, to more effectively victimize everyone else.

Regardless of the impression you get from the instant news and the fact that everything that happens anywhere is now known to everyone, not just the local populace who it affects directly, gun violence (and all violent crimes) is down. It has gone down steadily since a high in the 1980s, went up somewhat in the Bush II years (but never to the record levels we saw), and went down again under Obama. It's not gun violence that's increased, it's media attention.

As much as I hate to use an NRA talking point, there are already laws on the books making it illegal for ex-felons, etc. to own a gun. These have to be enforced. And we have to do something the NRA hates: institute background checks for all sales, including gun shows and online sales.

There's no way to prevent all gun violence. But the approach "other countries" use is not going to fit America.