Professional Troll

A friend was in town over the weekend and mentioned he got a new to him shotgun. He's not to knowledgeable on guns, but he described it as a bolt action 20 Ga, with a removable box mag, and when I described the Saiga mags, he said they were exactly like that. My Google-fu may be strong, but I have yet to find anything like this, so has anyone here heard anything about a gun like this?