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MBAssociates Gyrojet pistol, carbine and rifle - Fired 12mm or 13mm rocket projectiles. Turned out to be a commercial failure. Unfired rounds (if they can be found), can cost as much as
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MBAssociates Gyrojet Rocket Carbine Mark I Model B Nickel 13mm, MFD 1966-68 C&R | Lock, Stock & Barrel
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MB Associates Mark 1 Model B 13mm Gyrojet Rocket Launcher Pistol Review New World Ordnance - YouTube
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