I really hesitate to get in this thread, but I have a Serbu Super Shorty which is about as small as a pump shotgun will ever get, I expect. It is a heavily modified Mossberg Maverick, which is an even cheaper version of their already affordable shotguns.
Wonderful firearm if you’re defending the back seat from an attack from the front seat, otherwise I’m not sure. Anyhow, it came with a vertical pistol grip, which was really tough to shoot. Very hard on the wrist and hand.
Switching to a birds head grip was far easier on me, but still pretty unpleasant although it made it easier to transport.
The Serbu had been a 5$ “any other weapon,” transfer, but it was so demanding to shoot I spent $200 more (!) and had it papered again as a short barreled shotgun. Now it has a Chote stock and I like it a hell of a lot better.
This, gentlemen, has been my personal “now do I hang onto this thing?” short shotgun journey.