red flag here is the rounds and the gun barrel. i believe that we are still using the Russian mango rounds for ajeya ?
technology of the gun barrel is actually quite old. there is speculation that penetration of these rounds is close to just 500 mm of the armour. ERA may protect the tank from hesh rounds but they are no match for modern apfsd rounds.
this is russian t72 upgrade program:-
Russia will spend 2.5 billion rubles ($37 million) to upgrade 150 T-72Bs to the advanced B3M standard, Uralvagonzavod deputy director Alexey Zharich told the Russian newspaper Izvestia.
The
T-72B3M (T-72B4) will be upgraded with lot of new components including the new cannon 2A46M5 125-mm smoothbore gun as well as the
new Sosna-U sighting system paired with the 1A40-4 fire-control system. The tank will also receive a new ballistic computer to increase accuracy.
Independent commander’s PK PAN sight
The most notable upgrade is the stabilized, panoramic, independent commander’s PK PAN sight with integrated thermal viewer, thought to have similar specifications to the Sosna-U. This gives the tank the ability to engage targets in the “hunter-killer” mode. Source wikipedia.org
2A46M5 125-mm smoothbore gun
2A46M5 125-mm smoothbore gun (the lower cannon) @bastion-opk.ru
The
T-72B3M will be equipped with an
independent panoramic sight for the tank’s commander, with its own thermal imaging device.
(See above)
U sighting system paired with the 1A40-4 fire-control system for gunner
Sosna-U installation in a T-72 tank @vsr.mil.by
Sosna-U