Bryan S. sent me these pics of an odd defensive weapon. G-L Industries, in New Jersey, made this semi-automatic pistol for defense purposes. It is sort of predecessor to the paintball gun. It uses a CO2 cartridge for propulsion and is loaded by a 5 rd box magazine. It uses a variety of ammunition: stinger, noise, tear gas and fluorescent dye.

Here is an ad from Popular Mechanics back in 1970.