THE SCENARIO..
"I carry a mini blank firing gun in my pocket wherever I go. A surly looking stranger approached me as I was waiting for a bus. I immediately put my hand on my gun and told him to stop. He threatened to kill me if I didn't hand him my money. I knew the next move was mine, so I pulled the gun from my pocket so he could see it. He hesitated and stopped. I could see that he was unsure if I would shoot him.
Yes, you're right... It is a blank firing gun. It fires gunpowder charged loud blanks that are legal in my State. Rather than wait for his move, I pointed my gun at the sky and pulled the trigger. The gunshot sound was loud. The gunpowder flamed just like a real live fire gun and the brass round ejected out the slide. The perp's eyes opened wide and his face paled. He turned around and ran like a rabbit.