Gun violence stats in the U.S. have little to do with easy legal access to guns itself. Other factors, especially demographic ones, influence. Note that many states with very light gun laws have little gun homicide, other states with strict gun laws have high gun homicide rates and sometimes it's completely vice versa. Furthermore, if you look at the FBI's uniform crime statistics, the picture gets a bit clearer still, showing that the vast majority of gun crime happens in very specific areas of certain cities and particularly occurs among the African American community. I'm simply stating the numbers as they appear here, not making any judgments on any ethnic group per se.

People love to point at the U.S and its gun crimes as a direct result of the country's gun laws in particular, but overall, when certain very specific factors, population areas and very specific geographic regions are excluded, much of the country where guns of all kinds are easily available is barely more violent than your typical Western European country. The school shootings that people refer to are awful things, but statistically, they don't move any needle so much as an iota. They do however get enormous amounts of media attention. Other countries with very strict gun laws also have mass shootings and mass killings, both with guns and without guns, but again, less media focus because it doesn't fit certain narratives about the U.S being violent as hell because of gun posession.