I looked at a variety of sources for the above numbers, but it certainly didn't seem like gang- or drug-specific associations drove the majority of non-suicide

I looked at a variety of sources for the above numbers, but it certainly didn't seem like gang- or drug-specific associations drove the majority of non-suicide gun deaths. A decent chunk, but there are other reasons. One surprising / not surprising other fact: ~50-75% of gun deaths involve alcohol and ~25% meth.