The T-90MS is the latest version of the Russian T-90 main battle tank. It is also referred as Tagil. It is a modernized version and has a number of improvements and improved operational capabilities over it's predecessor. The Tagil was first revealed in 2011. It is being proposed for the Russian Army and possible export operators, including India.

   The T-90MS Tagil MBT has improved turret. Survivability of the tank was improved by adding a turret bustle. This combat machine has new composite armor as well as built-in Relikt explosive reactive armor (ERA) in place of the previous Kontakt-5. The Tagil is fitted with side skirts with built-in Relikt ERA. There is also a Shtora-1 countermeasures system, which significantly reduces the chance of being hit by enemy anti-tank guided weapons with semi-automatic guidance. As usually this tank is fitted with NBC protection and automatic fire suppression systems. Interior is lined with spall liner.

   The T-90MS is armed with new 125-mm high-accuracy smoothbore gun. This gun has increased range of fire over the previous weapon. It fires APFSDS, HE and HE-Frag rounds. The Tagil also fires 9K119 Refleks (NATO designation AT-11 Sniper-B) anti-tank guided missiles in the same manner as ordinary munitions. These missiles have a range of 4-5 km and can also engage low-flying helicopters. A total of 40 rounds a carried for the main gun. The T-90MS uses a proven carousel-type autoloader. As with it's predecessor 22 rounds are stored in the autoloader and are ready to use. However remaining rounds are stored in a new turret bustle rather than a crew compartment in order to avoid risks of explosion.

   Secondary armament consists of coaxial 7.62-mm machine gun and a remotely controlled weapon station, also armed with a 7.62-mm machine gun. Both machine guns are operated under armor.

   The T-90MS Tagil has updated observation and aiming devices, new Kalina fire control system. It also has a hunter-killer capability and tracks selected targets automatically. It is claimed that the new tank is 15-20% more accurate than it's predecessor.

   This main battle tank has a crew of three, including commander, gunner and driver.

   The T-90MS Tagil is powered by a new V-92S2F turbocharged diesel engine, developing 1 130 hp. Engine is coupled with an automatic transmission with 7 forward and 1 reverse gear. The new tank also has improved suspension and drivetrain. Maximum road speed of this tank has improved over it's predecessor. The Tagil is also fitted with auxiliary power unit, which powers all systems when the main engine is turned off. This combat vehicle is fitted with a deep wading kit, that can be installed by tank's crew within 20 minutes. With a deep wading kit attached it can ford water obstacles up to 5 m deep. The tank is also fitted with a self-entrenching blade.