IS-4 X
Skill4ltu evaluation:
- Armour Effectiveness
- Beginner Friendliness
- Gun Handling
- Speed / Mobility
- Ease of marking
- Ammunition
Community average ratings in 493 votes
- Overall (4.33)
- Fun (4.22)
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.
II
All-Terrain Suspension
Lightweight SuspensionIV
Parallax Adjustment
Aiming Gears LappingV
Sound Insulation
Periscope Electric DriveVII
Additional Noise Insulation 
Padding removalVIII
Auxiliary Safety System
Lightweight Mounting PointsChanges 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%
Skill4ltu notes:
You should have at least 3 perks.
*Order of skills and perks is important.
Hover the skills and perks to get full description of each.
Crew Transfer Info:
As of 5 September 2024, with the 1.26 Update, crew transfers have become much easier. You can now move crews between vehicles with fewer restrictions. The only limitations that still apply are based on the crew’s Nation and Vehicle Type.
For more details on these restrictions, check out the guide on crew restrictions.
For more details on these restrictions, check out the guide on crew restrictions.
Vehicle changelog
February 24, 2025
Modified: Second equipment setup, Crew Perks, Commander/Radioman from Signal Interception to Side by Side, Gunner from Designated Target to Quick Aiming, Ratings, Armour Effectiveness from 5 to 4,5, Gun Handling from 4 to 2,5
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