The 9×39mm is a Soviet rifle cartridge. The cartridge yields increased performance in shorter barrels and effective subsonic performance.
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The 9×39mm is a Soviet rifle cartridge. The cartridge yields increased performance in shorter barrels and effective subsonic performance.
==History and design== The 9×39 is based on the Soviet 7.62×39mm case but with the neck expanded to fit a 9.2mm bullet. The final design was completed by N. Zabelin, L. Dvoryaninova, and Y. Frolov of the TsNIITochMash in the 1980s. The intent was to create a more stealthy cartridge for suppressed firearms used by Spetsnaz and other special troops that had more power, range, and penetration than 7.62 US subsonic rounds tested at the time.
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