List of changes to the ST-1 tank:M62-T2 gun:
- Changed the reload time from 13.3 s to 12 s;
- Changed the accuracy of the gun from 0.38 to 0.4;
D-25T gun:
- Shells replaced: standard anti-tank shell with a 175 mm penetration core will be replaced by a full-caliber shell with 217 mm core penetration; a full-caliber shell with a core with a penetration of 217 mm will be replaced by a HEAT shell with a penetration of 270 mm;
- Cannon stability has been improved.
List of changes to the KV-4 tank:D-25-T gun:
- Shells replaced: standard anti-tank shell with a 175 mm penetration core will be replaced by a full-caliber shell with 217 mm core penetration; a full-caliber shell with a core with a penetration of 217 mm will be replaced by a HEAT shell with a penetration of 270 mm;
- Changed reload time from 12.1 s to 12 s;
- Aiming time changed from 3.4 s to 3 s;
- Changed the accuracy of the gun from 0.46 to 0.44;
ZiS-24 gun:
- Changed reload time from 10.3 s to 9 s;
- Aiming time changed from 2.9 s to 2.3 s;
- Changed the accuracy of the gun from 0.38 to 0.36;
- Cannon stability improved;
- Cannon armor has been strengthened.
List of changes to the KV-3 tank:D-25T gun:
- Aiming time changed from 3.4 s to 3.1 s;
- Changed the accuracy of the gun from 0.46 to 0.44;
- Cannon armor has been strengthened.