Discarding Shotgun Side Saddle

So I wanted a side saddle that was discardable (is that a word???) after the first load for my shotgun with a pic rail on the receiver and I came up with this. It is a friction fit and can be quickly removed after it empties into the shotgun. Perfect for a home defence shotgun as long as you have the rail.

Alternatively, if you use a flashlight similarly sized to a shell you can swap out a shell and have a light in place after the load.