Well to be honest, it’s the other way around. This gun was designed with a camera attached, so that anytime it was fired, there would be photographic evidence of what really happened. Perhaps not the most practical idea considering the possibility of poor lighting conditions, or a quickly moving hand which might blur the photos, but at least it’s a noble invention.
Revolver camera: a Colt 38 carrying a small camera that automatically takes a picture when you pull the trigger. At the left: six pictures taken by the camera. New York, 1938.