OMG! Want one!!! A DORYU 2-16 Pistol Camera, a police-issue camera gun originally fashioned way back in 1952!
The owner Ryu Koakimoto-san “says the pistol-shaped image capture device was used to photograph criminals in the act, as well as to record the faces of protestors (who will likely need to be arrested later). The 16mm camera is equipped with a built-in flash system, a bullet clip that holds five magnesium cartridges and a C-mount (like the one used in 16mm movie recorders). As you can see from the first photo, it can be fitted with a variety of lenses.”