Manufactured in the 1960s, the Mark II Gyrojet fires a 12 mm solid fuel rocket in place of a standard cartridge. As the rocket does not need a solid chamber or extractor to function, the entire pistol is greatly simplified compared to conventional pistols and made from lightweight materials. It is fitted with adjustable front and fixed notch rear sights, as well as a set of walnut grips. Includes a factory cardboard box.