Description Extremely rare and desirable MB Associates Mark I, Model B 13 mm GyroJet Rocket Carbine. Made famous in the James Bond thriller You Only Live Twice, the GyroJet concept used a proprietary rocket fuel housed in the body of the projectile that propels the projectile through 4 angled ports at the rear with the angle creating spin. This example with low serial number B0019 is one of only a couple of hundred prototypes ever produced making it extremely rare. This is also a pre 1968 example as it is marked 13MM which, after 1968, would have made it a destructive device. This pre 1968 is grandfathered and perfectly legal to transfer as a firearm. The barrel is 16-3/4″ and outfitted with a scope rail and a Bushnell Phantom scope. Must Ship to FFL or C&R holder Condition: Excellent showing signs that this has been fired. The bore smooth and this example shines like a mirror. The action functions properly and as expected. Barrel Length: 16-3/4″ Serial: B0019 Manufacturer: MB Associates Year: Pre 1968 Caliber: 13MM Model: MKI Model B