Switzerland has a lot of guns.

So why don't they have a lot of shootings?

Because, unlike us, they have universal weapons' training from a young age and mandatory universal military service, so everyone is familiar with the proper handling of weapons. All guns are registered and almost all guns require permits. The police conduct background checks and make psychological assessments before issuing permits: by law, anyone who "expresses a violent or dangerous attitude" is not permitted to own a gun and people who've been convicted of a crime or have an alcohol or drug addiction problem aren't allowed to buy guns. A gun owner who wants to carry for "defensive purposes" has to prove s/he knows how to load, unload, and shoot their weapon properly and must pass a test to get a license. Also, though they have a lot of guns compared to most countries, they have about 1/4 the number per capita that we do.

All this before you consider that their social services head off the kind of alienation and desperation so widespread in the US.