Hi, Im sorry for all of the spouses of individuals with PTSD, no matter what the source....
I have PTSD, and when I feel that rage, I know its about my PTSD, so I usually move to a "safe" place. Outside is good for me: it grounds me, and gives me the space to get perspective and calm, and even run if I need to.
My husband is great: he knows to just let me go, and that I will come back when I feel "safe". I do not want him around because my rage takes up so much "space".
We have small children, and he tells them that Im angry, NOT ABOUT THEM, and that people get angry sometimes, and its OK, I went for a walk to calm.
Then we use the opportunity to teach the children how to get rid of the mad in us (we go for a walk). Theres a great kids book called "when Sophie gets mad"......
Hang in there. Ask what he needs., make him go to therapy.
Good luck!