Originally Posted by Yunus
To me the Saiga is defined by it's ability to accept a drum.
You have free time on your hands, a Dremel tool and a shotgun you don't mind messing up?
You can make just about any semi-loading shotgun feed from a magazine or a drum if you want to monkey around and mess with it enough. While not a direct feed, straight into the chamber, you can probably make it feed into the under tube quite easily.