This entry details the experimental 9x19mm vz.38 'Nutcracker' prototype, a rare firearm with only two examples ever produced. Unlike standard blowback models, this prototype features a locked breech system utilizing a rotating barrel mechanism. The analysis highlights its unique mechanical modifications, including a thickened slide and helical cam grooves on the barrel retainer, allowing for safe operation with the more powerful 9x19mm Parabellum cartridge. The firearm also offers single-action capability, a departure from the standard double-action-only military production guns.
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