Myself I drew up a bill of sale and use it to transfer. I ask is your drivers license number.The information used on my form is the
date
drivers lic, number
name of buyer
name of seller
description of weapon sold
price sold
and a disclaimer stating that this transaction releases me of any interests in weapon or liabilty.
Both signatures
My reason is that I may not know you personally and you could go commit a crime and the police will come to me as the registered buyer.Or it prevents me from calling in a stolen weapon. It provides you with a bill of sale and reciept.And I think its just responsible protection for both parties.