I do want gun control but not based on MI.

If you have guns or want to get a gun. You need insurance for guns and a licence, like car ownership

If you have guns or want to get a gun.You must take gun safety classes and qualify to shoot at least every six months. Basics like keeping guns away from kids, actively suicidal or homicidal people(ie when someone with MI is in a crisis but not when they are stable, like bipolarNurse said)

I'd like to see semi automatics being banned. If you can't hit your target in 3-5 shots you aught to hang up the gun.