Rember the "Son of Sam"?
Years ago, there was a serial killer loose on the streets of NYC. He would approach parked vehicles with people sitting inside, and begin firing. Witness's reported that they would hear a shot, then "Click Click" Bang.
The detectives were trying to figure out the make of the revolver, and one of them happened to mention it to one of the department armorers who told them; "That's easy, it's a Charter Arms, most of them do that."