I personally don't care for guns, I don't own one and never used one. I come from a country where gun ownership is rare and very regulated.
Today I read lots of arguments in favor or against further regulation but none of them were very convincing. In most cases correlation is confused with causality. For example, most developed countries have much tighter rules on gun control and significantly less violence. This only shows correlation and doesn't prove or disprove that more gun controls will reduce violence. One could simply argue that there are many other variables that correlates with violence and COULD explain higher crime rates in the US compared to other developed nations.
How about we run a large scale A/B test instead. We pick two states with very similar characteristics, percentage of gun ownership, crime, poverty, income distribution, similar gun control laws, etc... We completely ban guns in one state and measure how crime evolves over a long period of time : 1 or 2 years. If we observe a significant drop in violence in the test state compared to the control (where gun laws will remain the same during the test) then we can start arguing that banning guns will reduce violence and less violence means less needs to own a gun for self defense. A less emotional/more data driven approach to policy making.
First - because being surrounded by states where access to guns is easier will mean it's likely that they'll be significant illegal traffic in guns. You already see that between areas with tight gun controls like NYC and other states.
Second because I think one or two years is unlikely to be enough time for affects to show. I'd bet you'd see a drop in male suicide - but the culture of crime and violence will take longer to change.