Just a word of wisdom, if you or a friend is ever in danger:
Call the cops and say "HE HAS A GUN."
Then give his name and address. And the safe/public place you are going to. Hang up and go.
Do not say you have a bad feeling or you got a weird text to a cop! Don't tell the story. Just say the magic word: GUN.
Be safe; be informed.
If he is in the room and can see you are making a call, call a suicide hotline. They have a direct line to police dispatch.
Share and save a life!
DO NOT use this information to get even with an ex. This is for legitimate, scary, need to protect yourself situations!