![ussr ussr](/images/flags/flag-ussr.png)
IS-4 X
- Armour Effectiveness
- Beginner Friendliness
- Gun Handling
- Speed / Mobility
- Ease of marking
- Ammunition
Community average ratings in 350 votes
- Overall (4.30)
- Fun (4.23)
Community average ratings for tier V+ vehicles
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XIS-4
Assault Heavy Tank
This is a proposed field modification from skill4ltu for IS-4.
![IS-4 IS-4](/images/fm/vehicles/R90_IS_4M.png)
II
![checkmark](/images/fm/checkmark.png)
![All-Terrain Suspension All-Terrain Suspension](/images/fm/eq/additionalGrousers_disabled.png)
![checkmark](/images/fm/checkmark.png)
![Lightweight Suspension Lightweight Suspension](/images/fm/eq/betterFriction.png)
IV
![checkmark](/images/fm/checkmark.png)
![Parallax Adjustment Parallax Adjustment](/images/fm/eq/improvedScope.png)
![checkmark](/images/fm/checkmark.png)
![Aiming Gears Lapping Aiming Gears Lapping](/images/fm/eq/improvedAimingHandling_disabled.png)
V
![checkmark](/images/fm/checkmark.png)
![Sound Insulation Sound Insulation](/images/fm/eq/improvedSpallingResistance_disabled.png)
![checkmark](/images/fm/checkmark.png)
![Periscope Electric Drive Periscope Electric Drive](/images/fm/eq/improvedObservationDevice.png)
VII
![checkmark](/images/fm/checkmark.png)
![Additional Noise Insulation Additional Noise Insulation](/images/fm/eq/improvedSpallingResistance.png)
![checkmark](/images/fm/checkmark.png)
![Padding removal Padding removal](/images/fm/eq/improvedSpeedIndicator_disabled.png)
VIII
![checkmark](/images/fm/checkmark.png)
![Auxiliary Safety System Auxiliary Safety System](/images/fm/eq/reinforcedInteriorModules.png)
![checkmark](/images/fm/checkmark.png)
![Lightweight Mounting Points Lightweight Mounting Points](/images/fm/eq/improvedTurretTurningWheels_disabled.png)
Changes to technical characteristics
Effectiveness of maintaining speed when crossing all terrain types
-7%
Hull traverse speed
+5%
Suspension durability
+10%
Accuracy
+3%
Aiming time
+5%
Stun duration
+10%
Additional stun duration
+15%
View range
+3%
HE-shell and ramming damage
-15%
Stun duration
-8%
Protection of the crew from injuries
+20%
Top forward speed
-2 km/h
Hull traverse speed
-5%
Durability of internal modules
+30%
Repair speed
+5%
Turret traverse speed
-5%
Dispersion during turret traverse
+5%
Vehicle hit points (bonus of Standard Modifications)
+5%
Vehicle changelog
September 25, 2023
Modified: Crew Skills : all updated and new 6 skills layout
August 04, 2020
- Link to Patchnotes 1.10
- Replaced the 122 mm D-25T gun (shell types: AP, APCR, HE; penetrations values: 175/217/61 mm) with the 122 mm D-25TS, which has the following parameters:
- Decreased the dispersion during movement by 28%
- Decreased the dispersion on hull traverse by 28%
- Changed the hull traverse speed from 26 to 30 deg/s
- Changed dispersion of the 122 mm M62-T2 gun from 0.38 to 0.42 m
- Decreased the dispersion on turret traverse for the 122 mm M62-T2 gun in the IS-4M turret by 25%
- Changed the reload time of the 122 mm M62-T2 gun from 12 to 11.5 s
- Changed the aiming time of the 122 mm M62-T2 gun from 2.9 to 2.5 s
- Changed the turret traverse speed from 22 to 25 deg/s
- Improved hull and turret armoring