I live in PA and just inherited my grandfathers M1 garand with a serial number in the high 200k which in research was produced in 1941. I have no idea if everything is original or not. My main question is do I need to do any paper work and register this to make me the legal owner? Looking through all his military records (everything he kept) there is no info regarding this specific rifle. Not sure if it was his or repurchased. It was evaluated and they said its in firing condition but my uncle didnt ask about the legallity before I received. Thanks!