A product of the 1960s, the Mark I Gyrojet uses a miniature solid fuel rocket in place of a standard cartridge. As the rocket does not need a solid chamber or extractor equipment, the entire pistol can be greatly simplified and made from lightweight materials. Elevation adjustable blade front and fixed notch rear sights, a sliding magazine cover, front-mounted hammer, engraved model, caliber and serial number markings on the left side, and a pair of smooth grips. With a hardwood MBA display case, Robert Hutchings Goddard plaque, and thirteen rounds of Gyrojet ammunition (some spent, some possibly live). Also included is the September, 1965 issue of "Gun World" featuring a cover article on the then new Gyrojet pistols and a copy of the January/February 2015 issue of "American Handgunner" with an article discussing Gyrojet pistols.

Fine. The pistol has been mostly polished bright with areas of original black finish remaining in the harder to reach places. The markings are sharp. The grips are fine with some small dings and the left panel having separated from the frame. Mechanically fine.