Justin Black - Espionage History on Instagram: "Pen guns have been used all over the world throughout the 20th Century by intelligence agencies, covert operators, assassins, and even regular citizens interested in self defense. Pen guns are single-shot weapons, often in a small caliber such as .22 rimfire, which appear to be a regular inkpen at first glance. Pen guns are simplistic, easily manufactured, and can take on a variety of appearances. The Office of Strategic Services issued a pen gun k

How to Make a BB Gun with a Pen or Mechanical Pencil