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The NSV (Russian НСВ Никитина-Соколова-Волкова) is a 12.7 mm caliber heavy machine gun of Soviet origin, named after the designers, G. I. Nikitin (Г. И. Никитин), Y. S. Sokolov (Ю. М. Соколов) and V. I. Volkov (В. И. Волков). It was designed to replace the DShK machine gun and was adopted by the Soviet Army in 1971. It is no longer being manufactured in Russia; the manufacturing license for the NSV ended up in Kazakhstan after the break-up of the Soviet Union, but the new Kord machine gun has been developed instead and is used to replace worn-out units. The NSV has been manufactured in Bulgaria, India, Poland and Yugoslavia under license. The NSV weighs 25 kg, has a rate of fire of 13 rounds per second, and an effective range of 1,500 meters. A fully loaded ammunition belt with 50 rounds weighs 11 kg. The NSV is used on the T-72 tank, while the NSVT variant is used on the T-64 and T-80 tanks. Type Heavy machine gun Place of origin Soviet Union Service history In service 1971--present Used by See Operators section. Wars Soviet war in Afghanistan, Nagorno-Karabakh War, Gulf War, Afghan Civil War Iraq War 2008 South Ossetia war Production history Designer G.I. Nikitin, Y.S. Sokolov, V.I. Volkov Designed 1969 Variants NSVT Specifications Weight 25 kg (55.12 lb) (gun only) 41 kg (90.39 lb) on tripod 11 kg (24.25 lb) (50-round belt) Length 1,560 mm (61.4 in) Cartridge 12.7×108mm Action gas-operated Rate of fire 700--800 rounds/min Muzzle velocity 845 m/s (2,772 ft/s) Effective range 1.5 km vs. air (maximum) 2 km vs. ground targets Feed system belt 50 rounds Sights Iron sights