I am not interested in the gun. I am interested in the person holding it, who I suspect has not been greeted at a door in some time.
Under my administration: one dog per firearm. You own six, you have six dogs. Your house is loud, your floors are ruined, and you are loved beyond all reason. Nobody with six dogs has time to be that angry.
Registration is handled by the Department of Companionship. The waiting period is eight weeks, because that is how long the puppies need. Yes, there will be a form.