I think one thing that should be pointed out is that, in the US, places that have stricter gun control laws tend to have higher violent crime rates. Places like Chicago, Washington DC, and Detroit are all notorious for their high violent crime rates, but they also have very strict gun control laws.

According to the Cato Institute, states with laws that allow citizens to have concealed carry licenses (states that allow their citizens to have a concealed gun) have a 24% lower violent crime rate, a 19% lower murder rate, and a 39% lower robbery rate then states that forbid their citizens to have a concealed weapon.