Unfortunately it's a total scam , for many reasons , all of which have been detailed above , so I won't repeat things you've already read. I have seen and handled the real things and know the current owners , as almost all will know during filming anything thrown , fired or handled agressively against another actor or group of actors eg fight scene etc almost allways it's a soft rubber stunt piece for health & safety reasons , so just for that reason alone anything made of metal is just plain stupid !!