Just because he knows you're bipolar doesn't mean he will assume anything about your relationship with guns.

The 2 subjects are completely independent of eachother. Most folks I know would feel offended if their friends thought they shouldn't touch a gun because of their diagnosis.

Hell where do we draw the line? Should I not be cooking because I'll cut myself or stab someone or even commit arson?

See what I'm saying here???

People aren't mind readers, and most of us don't want people assuming negative things about us. So its up to us to voice our truths and hopefully the person listening is respectful regarding what we share with them.

You really don't have to end a friendship over something so simple, and yes I mean simple, as in easily fixed, please don't read "trivial" because I can see this distresses you and I am not trying to invalidate that at all.

So, you can either refuse to go shooting while depressed because you're at risk, or you say no to guns completely and maybe even arrange an alternate shooting buddy for him.

Since he knows about the bipolar, I don't foresee this to be a terribly awkward convo...

Seriously, don't complicate things, life has a way of doing that all by itself.