finally got to ya'. Here's 3 cut downs for your viewing pleasure.
First a P53 cut into a "blanket gun".
Don't think the sights were necessary at 6 or 7 feet.
The next P53 was a Georgia contract gun, made by Barnett, off of the CS Gladiator. the original barrel must have been damaged and she ended up as a P56 carbine.
Barnett numbers were stamped on the toe of the butt plate.
Last, but never least is a shotgun. London proofs. Just a run of the mill imported trade gun, cut to around 12 inches for Cavalry use with a very special sling attachment.