Shown here is an ordinary single shot hammer shotgun. It is one of the most unique shotguns I have ever come across.
Made by the Alofs Manufacturing Co. is a patented attachment to convert this very ordinary single shot hammer gun into an auto-loader. The apparatus and magazine tube appears to be made of steel and is attached directly to the left side of the gun at the hinge. Very little is known about this device; however, it converts the firearm into an auto-loader and seems to work seamlessly.
Guns like this with an auto loader are going for over $1100!
Check out this video from C&Rsenal gives a full demonstration of what this old fashion autoloader can do.