Original D.R.P. Sadi toy gun. When you pull the trigger a small, but sharp, spike comes out. It is meant as a prank that was probably funnier then than it is now. It was meant to be pushed against someone's skin so that the spike would poke them when the trigger was pulled. I could see how someone shoving a gun against you then hearing a cap go off and suddenly feeling a sharp poke might seem like actually being shot. The spike is sharp enough to draw blood. They measure about 4" long. They do have some rust. Price is for one.
These are sold as a collector's item only. Do not attempt to use these on skin (the spike is the rustiest part and you don't want tetanus).