For East Asia, specifically South Korea and Japan who banned guns for anyone, but probably the bodyguards for politicians. They have very low gun violence, if not at all. To the point where robbers attempt BB-Guns to rob banks so many times in the history.
^But they have high rating of knife murdering, random "don't ask" / lure murders etc.

But America, I'd say it's definitely different. I mean banning it will eventually reduce to some degree, but (legal/illegal)guns are way too wide-spread already. most importantly, in American people's mentality has like "PROTECT YOURSELVES" as slogan. If someone really comes out with the ultimate solution for guns, I'd definitely support them. So far, nothing we can do. This is why, bronx kids are ordered by parents to come home and play video games, rather than hang out outside, cause it's so easy to get involved with gangs/guns/fights even in hs.