At the heart of the Groza is the standard Russian 7.62x39mm rifle cartridge to which 30-round magazines are supplied - the same magazines as used in the AK-47/AKM family. The action relies on a gas-operated system with a rotating bolt mechanism (based on the AKS-74U) allowing for a rate-of-fire of 750 rounds-per-minute to be achieved. Muzzle velocity is listed at 300 meters with a maximum engagement range of 500 meters. Selective fire is achieved via an integrated selector.
The ITs-14 has been developed beyond its initial OTs-14-1A "Groza-1" offering to include the OTs-14-1A-01 carbine (with vertical foregrip), the OTs-14-1A-02 special carbine (supporting a suppressor and shorter barrel), the OTs014-1A-93 sniper variant (supporting a suppressor, shorter barrel and mounting for more advanced optics) and the OTs-14-1A-04, a grenadier variant supporting the underslung grenade launcher attachment.
Beyond some other experimental variants, a more distinct form is the OTs-14-4A "Groza-4" as this is chambered for the 9x39mm subsonic cartridge highly suitable for clandestine work, particularly when paired with a suppressor. This version utilizes a shorter 20-round magazine and initially appeared in 1994. As in the Groza-1 family, the Groza-4 has been evolved along the similar lines to include the OTs-14-4A-01 assault carbine, the OTs-14-4A-02 special carbine, the OTs-14-4A-03 sniper variant and the OTs-14-4A-04 grenade launcher-supporting model.
The OTs-14 has been adopted by Russian special forces (SPETSNAZ), paratroopers, army engineering units and government internal security forces.
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