Unique and RARE. This 1940’s to 1950’s Naval Practice Round have a screw off end which reveals a secret compartment that you could hide some small goodies or large bills! We were told that the compartment was designed to be filled sand in order to simulate the real weight of a live round. Each practice round is marked CARTRIDGE DRILL M18A1 20MM GUN. Each cartridge measures: 7 3/16″ H x 1″ diameter. Unused, in original found condition. Will have surface corrosion from 65+ years of storage. Price includes 10 inert rounds.
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