Consider Norway and its neighbors Sweden, the Netherlands, and Denmark. Norway has far and away Western Europe’s highest household gun ownership rate (32%), but also its lowest murder rate. The Netherlands has the lowest gun ownership rate in Western Europe (1.9%), and Sweden lies midway between (15.1%) the Netherlands and Norway. Yet the Dutch gun murder rate is higher than the Norwegian, and the Swedish rate is even higher, though only slightly.
As with abortion and divorce, it all comes down to social and especially economic stability.