Thye are better amored, more powerful, and more reliable.
The T-90S armament includes one 125mm 2A46M smoothbore gun, stabilised in two axes and fitted with a thermal sleeve. The gun tube can be replaced
without dismantling inside the turret. The gun can fire a variety of ammunition including APDS (Armour Piercing Discarding Sabot), HEAT (High
Explosive Anti-Tank), HE-FRAG (High Explosive Fragmentation) as well as shrapnel projectiles with time fuzes.
The T-90S gun can also fire the 9M119 Refleks (NATO designation AT-11 Sniper) anti-tank guided missile system. The range of the missile is 100m to
4,000m and takes 11.7 sec to reach maximum range. The system is intended to engage tanks fitted with ERA (Explosive Reactive Armour) as well as
low-flying air targets such as helicopters, at a range of up to 5km. The missile system fires either the 9M119 or 9M119M missiles which have
semi-automatic laser beamriding guidance and a hollow charge warhead. Missile weight is 23.4kg. The guns automatic loader will feed both ordnance and
missiles.
Also fitted is a coaxial 7.62mm PKT machine gun and a 12.7mm air defence machine gun. A 5.45mm AKS-74 assault rifle is carried on a storage rack.
SELF-PROTECTION
The T-90 tank is protected by both conventional armour-plating and explosive reactive armour (ERA).
The T-90 is fitted with the Shtora-1 defensive aids suite which is produced by Electronintorg of Russia. This system includes infrared jammer, laser
warning system with four laser warning receivers, grenade discharging system which produces an aerosol screen and a computerised control system.
It is also fitted with NBC (nuclear, biological and chemical) protection equipment.