Over the years when I get caught up with people in discussions about shotguns, I like to bring up the Russian KS-23.
The Russians, having some 23mm AA guns barrels laying around, decide to turn them into a pump action shotgun. Thus the KS-23 was born. Part of the idea of it was to also use it to launch exotic munitions. If it was ever used for that, I don’t know. It is about 6 and a quarter gauge.
What I do know is that the Russian have fielded some of them, and you can occasionally see pictures of their fine men carrying these implement of peace.
While I was telling some people about this shotgun today, I was doing an image search to show them these images, and I learned that a handful of these were imported some years back. Estimates range between 25-50. The imported ones had a longer smooth bore barrel and wood furniture. Named the TOZ-123, they were also called the BFG-1 by the importer. I don’t know what the original price was, but I saw one was sold for $1400 back in 2008. I heard of one selling for $2500 a couple of years ago.
An owner of one put together a video of him talking about it and disassembling it. They were marked 4 gauge, but are really a custom 6.27ish gauge.
Seems kinda silly to just have one of these. I mean, if you are going to have one, wouldn’t you want one for each hand?