i have a buddy that was given a 44 mag in a trade and i would like to buy it from him. it is not registered to him so can i buy it and have it registered to me? if i don't regester it is it an illegal firearm if i ever get caught possesing it? i know that rifles and shot guns are grandfathered all the time but i was curious because its a handgun.. any advise and input would be greatly appreciated!!!