the answer is in the question. anything that is 50 years or older so that would mean that your firearm would have to be made on 1962 or later. an it has to be an original an not a reproduction or fake.
23 year old NRA member
AKaholic #158907 , 1942 Ex-Sniper Izzy Mosin Nagant, 1970's Marlin 30-30, Remington 870 tatical, Charter Arms The Pink Lady 38 Special.