I need help witha shotgun.

[Bugabear]

No sorry its not any of them. It could have been a fake video edited to look real. And no I dont have the video. The gun itself looks just like a a plain old pump shotgun but it has a small visible box magazine in front of the Trigger. The magazine itself is pretty small, about the same size as a SMLE mag. The gun itself is pump action. It could have been an experimental model.

Thanks for all your help people.