Most states have some kind of mandatory automobile liability insurance, so that if the vehicle's owner or a guest driver causes an accident, the victims will be compensated.
I suggest gun liability insurance. Force every gun owner to register his weapons and purchase liability insurance for his weapons. Some people would give up their weaons rather than pay the insurance. If that doesn't work, send the police door to door and confiscate all guns, with the promise that the Second Amendment will be followed when, and if, a well-regulated militia is organized.
Jesus paid the price for me and everybody.