The OTs-14-4 "Groza-4" (Russian: ОЦ-14-4 "Гроза", lit. 'Storm') is a Russian selective fire bullpup assault rifle chambered for the 9×39mm subsonic cartridge. It was developed in the 1990s at the TsKIB SOO (Central Design and Research Bureau of Sporting and Hunting Arms) in Tula, Russia.
The OTs-14-4 "Groza-4" (Russian: ОЦ-14-4 "Гроза", lit. 'Storm') is a Russian selective fire bullpup assault rifle chambered for the 9×39mm subsonic cartridge. It was developed in the 1990s at the TsKIB SOO (Central Design and Research Bureau of Sporting and Hunting Arms) in Tula, Russia.
Source: Wikipedia "OTs-14 Groza" · CC BY-SA 4.0
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