You might be able to sell that long gun (haven't looked it up) but he/she/they can only carry it in very limited supervised situations, Soooooooooo, if you sold it to a 16 year old, you are contributing to the delinquency of a minor.I went on the ATF website a while back and read legality of private sale I was a little shocked 18 for a handgun and no age limit on long gun private sale so legally you can sell a handgun to a 18yr old tranny or not and you can legally sell your unwanted AR to a 8yr old let that sink in.