Caliber, mm: 9×39 SP-6, 7.62×39 M43
Action: Gas operated, rotating bolt with 2 lugs
Length: 610 mm (with grenade launcher installed)
Barrel length: 240 mm
Weigth: 2.7 kg in basic configuration; 4.0 kg with attached grenade launcher
Magazine: 20rds (9mm), 30rds AK-47 type (7.62mm)
Rate of fire: 700 rounds per minute
The OTs-14 “Groza” (“thunder”) modular assault rifle was developed during the early 1990s by V. Telesh and Ju. Lebedev at the TSKIB SOO (Central Design Bureau for Sporting and Hunting Arms, located in the city of Tula). It was intended for various Special Forces in the Russian army and Internal Affairs Ministry as an dedicated CQB / Urban warfare weapon. It was briefly manufactured in small numbers at the Tula Arms factory during the mid-1990s. OTs-14 rifles saw some action during the first anti-terrorist campaign in Chechnya in 1999, but soon felt out of favor and are no longer made.
The OTs-14 is based on the familiar AKS-74U receiver and action, modified for the larger 9 x 39 subsonic ammunition favored by various SpetsNaz troops. It is fitted into a bullpup layout, with removable trigger / pistol grip unit which could be replaced with an alternative unit integral with 40 mm grenade launcher. In the grenade-launching configuration, a single trigger controls both the 40 mm GL and the rifle itself, with a separate barrel selector. The safety / fire mode selector of AK pattern is retained and in bullpup configuration is especially uncomfortable to operate. The barrel can be fitted with a quick-detachable silencer. Standard open sights are built into the carrying handle, which results in relatively short sight base. The carrying handle also has mounting points for telescope, red dot or night sights.