Just wanted to post a follow up. If anything maybe this can help anyone who runs into this situation in the future.
I ended up just having a heart to heart with him. Went out hiking together and I just opened up to him. It was awkward and at first he didn't say a word. I thought for a moment he was peeved off at me and that was the end of it. Then it was like a wall just broke, he started opening up in a way that in 10+ years I've never seen from him.
He agreed to let me hold the gun for a couple months until he is a little more stable. And now that I know what is really the core of his depression, I can begin to help him.
Thanks INGO for giving me the spunk to do this. I know I haven't contributed much on here but I've been a member for a few years and can honestly say this is a great community.
I'm glad you were able to do this for him. I hope he heals and is able to see life as the gift it is meant to be