It never occurred to me but that makes total sense since in many states - a handgun cannot be in the posession of someone under 21 whereas a rifle or shotgun is allowed. I get it now....I work at Wal-Mart and we are prompted if the ammo will be used in a handgun yes/no. If we hit "no" it then asks if the buyer is over 18. If we hit "yes" the register asks if the buyer is over 21.
Ca 18 year olds buy ammunition in California?
Can 18 year olds own a rifle but not a pistol?
I just bought some mini mags today and the question was asked: Is this for a pistol or rifle. Of course they didn't ask the question about the 9mm ammo I bought....