https://www.businessinsider.com/us-vs-western-homicide-rates-2014-11
A trope from the pro-gun crowd is that if people want to commit murder, and guns they don't have easy access to guns, they'll just find other means. The fact that people in the US, where guns are so easy to obtain, murder at a much higher rate than high income countries with strict gun control, is strong evidence that pro-gun crowd's claim is bogus.
Guns make murder just about as easy as imaginable. A commonly used phrase to describe something very easy is "push of a button". All it takes to murder with a gun is a simple movement of the finger. There is extra effort involved in committing murder without a gun that militates against motivation.