OTs-14 Groza

GROZA-1
Ots-14 Groza drawing
Type	Bullpup assault rifle
Place of origin	Russia
Service history
In service	1994–present
Used by	Russia
Wars	See Conflicts
Production history
Designer	V.N. Telesh and Y.V. Lebedev
Designed	1990s
Manufacturer	TsKIB SOO
Produced	1994
Variants	OTs-14-4A OTs-14-4A-01 OTs-14-4A-02 OTs-14-4A-03
Specifications
Weight	2,7 kg (OTs-14-4A-01 and OTs-14-4A-02) 3,6 kg (OTs-14-4A and OTs-14-4A-03)
Length	610 mm (OTs-14-4A) 565 mm (OTs-14-4A-01) 500 mm (OTs-14-4A-02) 720 mm (OTs-14-4A-03)
Barrel length	240 mm (Groza-4) 415 mm (Groza-1)
Width	60 mm (OTs-14-4A without a grenade launcher) 75 mm (OTs-14-4A with a grenade launcher mounted) 70 mm (OTs-14-1A without a grenade launcher) 80 mm (OTs-14-1A with a grenade launcher mounted)
Height	294 mm (OTs-14-4A without a grenade launcher) 266 mm (OTs-14-4A with a grenade launcher mounted) 350 mm (OTs-14-1A without a grenade launcher) 320 mm (OTs-14-1A with a grenade launcher mounted)
Cartridge	9×39mm (Groza-4) 7.62×39mm (Groza-1)
Action	Gas-operated, rotating bolt
Rate of fire	700 rounds/min (Groza-4) 750 rounds/min (Groza-1)
Muzzle velocity	300 m/s (Groza-4) 720 m/s (Groza-1)
Effective firing range	200 m (Groza-4) 300 m (Groza-1)
Maximum firing range	400 m (Groza-4) 500 m (Groza-1)
Feed system	20-round detachable box magazine (Groza-4) 30-round detachable box magazine (Groza-1)
Sights	Iron sights, several optical and night vision sights

The OTs-14 Groza (ОЦ-14 "Гроза") is a Russian selective fire bullpup assault rifle chambered for the 7.62×39 round and the 9×39mm subsonic round. It was developed in the 1990s at the TsKIB SOO (Central Design and Research Bureau of Sporting and Hunting Arms) in Tula, Russia. The weapon is colloquially known as OC-14 or OTs-14 "Groza" ("Thunderstorm"). The OTs-14-4A "Groza-4" has one derivative, the TKB-0239 (ТКБ-0239), also known as OTs-14-1A "Groza-1", chambered for the 7.62×39mm round.

Work on the OTs-14-4A project began in December 1992. The weapon's chief designers were Valery Telesh, responsible for the GP-25 and GP-30 under-barrel grenade launchers, and Yuri Lebedev. The team set out to design an integrated and modular system that would incorporate all the best features of a close-combat long gun into a single weapon based on the AKS-74U. Prototypes were ready for testing in less than a year and the weapon was ready for production by early 1994.

It was first presented to the public at the MILIPOL Moscow trade show in April 1994 and adopted by the Ministry of Internal Affairs (MVD) shortly thereafter. The success of the OTs-14-4A in the hands of MVD personnel brought it to the attention of the Ministry of Defence (MO), who also had a requirement for such a weapon. After a period of testing, the weapon was adopted for Spetsnaz forces and some airborne and specialist front-line combat units such as combat engineers. The weapon was originally intended to have used any one of four cartridges: 5.45×39mm, 5.56×45mm NATO, 7.62×39mm or 9×39mm. That idea was dropped and the assault rifle was originally chambered in 9×39mm to meet the MVD's requirement for a close combat weapon for deployment in Chechnya, with a variant chambered in 7.62x39mm manufactured later.