Too bad it looks like one of those old Remington slugmasters or whatever they called them with his finger on the trigger. Priceless!! :-)
I am not even sure that is a real shotgun. It might be Photoshopped. Look at the distance from his hand which apparently is right at the back of the action, to the butt pad.
I just put on my reading glasses and I can see just a bit of the receiver behind his hand so the photo is probably real. I can also see the rifle sights on what is probably an 870 slugster or whatever they call it.