So is it a “handgun” or what? I’d put a shoulder stock on it myself. Like the abbreviated barrel for entertaining house guests.
It is classified by the BATFE as a "firearm." It has an overall length longer than 26", was not designed to be fired from the shoulder (no shoulder stock,) and it was never at one time a shotgun.
If you want to put a shoulder stock on it, you must first purchase a $200 NFA tax stamp, fill out the Form 2 paperwork, and wait the 9-12 months for the BATFE to issue you the stamp.
If you don't go through the tax stamp process first, you're creating a short barrel shotgun and have committed a felony.
Neither ...... first I’ve heard of this new law in my own state. Doom on me for not being up to date......