Working Man
Member
Its because a "shotgun" under current federal law is designed to be fired from the shoulder. A 12ga with a pistol grip is only a "firearm" as its not designed to be fired from the shoulder, which requires you be 21 to purchase (anything other than a "rifle" or "shotgun" requires you be 21).
I was under 21 when I bought my Winchester Defender 20ga with a pistol grip
from Oshman's in the mid 90s. I wonder how many places are selling them to
under 21 still.