Detachable magazine shotguns with Hi cap magazines...Who makes them?

[too many choices!?]

Does anyone have a saiga or other type of shotgun that has Hi cap detachable box magazines? Not the revolving cylinder type either......If so who is the maker of the gun and the magazines? thanx in advance

 

[CaCrusin]

The Sidewinder...

allows you to convert any Mossberg 500, 590 or Maverick 88 to accept detachable and interchangeable magazines. A 10-round drum and a 6-round box magazine are available. There is a cool video on the website showing it in use.