Dual Caliber Revolver.
DEPARTMENT OF THE ARMY WASHINGTON DC
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The benefits of a dual caliber gun have been set forth in various periodicals. Dual caliber revolvers come into consideration as training weapons. Dual caliber revolvers are also important in survival situations, for example downed aircraft or lost hunters. Prior art dual caliber pistons have one barrel below the other one. Such guns possess an inherent accuracy disadvantage. In addition the internal mechanisms of the guns differ so drastically from standard guns that manufacture is expensive and reliability questionable. A more reliable dual caliber gun is provided herein which has a single trigger, normal spring action, and an unmodified firing mechanism. Author