That was my first impression... However, I have been wrong before (not often though )I would bet the gun in the picture is either a toy or or some home modified experiment. The gun holders right hand does not have a natural hold on a pistol grip - maybe there is some kind of sawed off stock at best.
its a lever gun ??94/92.note the right hand, the fingers are on the lever.With that long reciever and what apears to a over and under barrel witch I suspect is a magazine tube. I think it is a model 94 winchester that someone has cut down. Not practical for any kind of use and quite illegal unless you purchased the reciever before it was assembled in to the rifle it was intended.