The T-84 main battle tank is a further development of the T-80UD. Development of the T-84 began in the late 1980s, and it was revealed in 1995. It entered service with Ukrainian army in 1999. The only export operator is Pakistan, which acquired 320 of these MBTs.
Vehicle is fitted with built-in explosive reactive armor blocks. Protection is enhanced by Shtora-1 countermeasures system, significantly increasing tank's survivability against ATGW with semi-active or semi-automatic guidance.
The T-84 has similar weapons as the T-80UD. It is armed with a 125-mm smoothbore gun, fitted with an autoloader. This MBT is also compatible with the 9K119M Reflex (NATO designation AT-11 Sniper-B) anti-tank guided missiles. These missiles are launched in the same manner as ordinary rounds.
Secondary armament consists of coaxial 7.62-mm machine gun and roof-mounted 12.7-mm machine gun.
Vehicle is powered by a 6TD-2 turbocharged diesel engine, developing 1 200 hp. Some variants of the T-84 are powered by a 6TD-3 turbocharged diesel, developing 1 500 hp. Auxiliary gas turbine power unit is fitted to power all the tank's systems, when the main engine is turned off. The T-84 has a deep wading kit, and built-in entrenching blade.
Models of the T-84 include the T-84U MBT with new armored side skirts, built-in Kontakt-5 explosive reactive armor, muzzle reference system and some other improvements.