The T-80 is a main battle tank (MBT) designed and manufactured in the Soviet Union. When it entered service in 1976, it was the second MBT in the world to be equipped with a gas turbine engine after the Swedish Strv 103 and the first to use it as a primary propulsion engine. The T-80U was last produced in a factory in Omsk, Russia, while the T-80UD and further-developed T-84 continue to be produced in Ukraine. The T-80 and its variants are in service in Belarus, Cyprus, Egypt, Kazakhstan, Pakistan, Russia, South Korea, and Ukraine. Further development with a better turret, Kontakt-5 explosive reactive armour, improved gunsight, and 9M119 Svir missile system. In 1990 a new, 1,250-hp, engine was installed. Overall protection with Kontakt-5 against APFSDS/HEAT is 780/1,320 mm RHAe. 9K119M with antitank guided missile 9M119M installed since 1990. Some of the tanks in commander version (T-80UK) equipped with Shtora-1 APS, and thermal imaging night sight TO1-PO2T (detection range / target classification range = 6,400/4,600 meters at night). Basic thermal night sight of the T-80U is within the limits of 1,750/1,500 meters.