I've been thinking about your question, i.e., ptsd and midlife crisis a similar occurrence. In some ways yes and other ways no. MLC is about them going way, way back in time and reliving their childhoods. It's a place where they were emotionally stunted and they have to face those issues, accept the things that they can and realize as children, they were not the cause of whatever the authority figure did or didn't do to them. If they can heal themselves, they should come out better people.
Many of the symptoms are the same in both situations. Was/is your h a veteran or someone who has had to deal w/a severe trauma? Have you spoken to a professional about his ptsd? If not, I am going to suggest that you learn all you can about it because some of the symptoms are very different from MLC.
As for the guns, you can't assume anything when it comes to being a danger to himself or anyone else. If they get angry enough, they'll snap and do whatever they have to do to find some peace.
The "I deserve to be happy"! sounds like MLC script...but keep in mind, he could have both issues going on at the same time and it would be difficult for us to decide what is MLC and what is ptsd. We are not professionals here and can only offer up support and advise you to seek some counseling for yourself at this time. Me? I would be concerned about him having access to guns. Don't ever assume anything w/a person in crisis.
Please take care of yourself and if you are around him when he's angry, don't engage, say "I'm sorry you feel that way" and walk away. You do not want to give him any additional fuel for that fire that is burning in his soul.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
