Iceland is a much different country from the US, but they haven't had a shooting death since 2007!  Maybe we can learn a little something from them.   Gun ownership in Iceland is very prevalent but there is a long process to get one. I doubt we would be able to eliminate the shootings in this country, but can't we cut down on them??

https://www.nbcnews.com/news/world/iceland-gun-loving-country-no-shooting-murders-2007-n872726