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SECTION 10 // ARMOR / VEHICLE PROFILEREF · OBJECT-257
IX
Object 257
USSR·
Heavy Tank·HT breakA project of the heavy tank designated IS-7 that was developed in 1945. The vehicle was supposed to feature an electromechanical transmission. Development was discontinued at the documentation design stage. Existed only in blueprints.
Configuration
Health
2,000
DPM
2,031
View range
390m
Speed
50km/h
Camo
18Terrible
Mark of Excellence requirementsCombined dmg + assist · NA · 2026-07-12
3 marks · 95%
2,900
2 marks · 85%
2,336
1 mark · 65%
1,621
A-01 · ARMOR SCHEMA
Armor thicknessMeasured
Nominal plate thickness straight from the game client. Click any plate to highlight it on the 3D model and focus the camera on it.
Armor
20mm350mm
Hull
All 7 plates
Turret 2 of 2
All 14 plates
A-02 · SPECIFICATIONS
Specifications
Builds
Grade
Experimental
CrewShared perks
Field mods
Lv 0/7
Weaponry
- DPM
- 2,031
- Damage
- 440
- Penetration
- 248 mm
- … at 500m
- 222 mm
- Reload time
- 13.00 s
- Rate of fire
- 4.62/min
- Aim time
- 2.90 s
- Dispersion
- 0.400 m
- … moving
- 0.180
- … tank traverse
- 0.180
- … turret traverse
- 0.100
- … after firing
- 3.5
- Damage vs. modules
- 165
- Caliber
- 122.0 mm
- Shell velocity
- 1,259 m/s
- Max range
- 720 m
- Ammo capacity
- 40
- Potential damage
- 17,600
- Shell cost
- 1,180 cr
Mobility
- Top speed
- 50 km/h
- Reverse speed
- 15 km/h
- Power/weight
- 15.45 hp/t
- Tank traverse
- 40.0 °/s
- Turret traverse
- 26.0 °/s
- Effective top speed
- … hard
- 47.6 km/h
- … medium
- 36.4 km/h
- … soft
- 24.7 km/h
- Effective traverse
- … hard
- 40.0 °/s
- … medium
- 30.6 °/s
- … soft
- 20.8 °/s
- Gun elevation
- 15 °
- Gun depression
- 5 °
- Gun traverse range
- 360°
- Terrain resistance
- … hard
- 1.30
- … medium
- 1.70
- … soft
- 2.50
Everything Else
- Hull armor
- 130 / 130 / 70
- Turret armor
- 350 / 240 / 100
- Health
- 2,000
- Engine health
- 360
- … repaired
- 180
- Track health
- 240
- … repaired
- 180
- … repair time
- 6.86 s
- Ammo rack health
- 210
- … repaired
- 140
- Fuel tank health
- 200
- … repaired
- 80
- Total weight
- 55,000 kg
- Stationary camo
- 5.55 / 0.92%
- Moving camo
- 2.80 / 0.47%
- View range
- 390 m
- Fire chance
- 12%
- Tank cost
- 3,560,000 cr
Gun Constraints
360° traverse
Crew
CommanderRadio Operator
Gunner
Driver
Loader
A-03 · MODULE RESEARCH
Module research
Guns
VIII
Stock
122 mm BL-9 (257)
IX
56,000
122 mm BL-13-1 (257)
Turrets
A-04 · SERVER PERFORMANCE
Server performance
Aggregate stats from NA players over the last 30d
Avg WN8
2343
Great
Avg WNX
2862
Unicum
Win rate
38.9%
Terrible
DPG
2340
Frags
1.06
Spots
1.11
Survival
33.3%
Dmg taken
1845
Hit rate
77.3%
Spot assist
455
Track assist
58
Defense
0.00
Avg XP
910
Aggregated from 7 tracked NA players · 18 battles. Coverage grows as more players are tracked.
MoE thresholds (combined dmg + assist)
65%1,621
85%2,336
95%2,900
Reach these combined damage (dealt + assist) values over a rolling window to earn marks of excellence.
A-05 · TOP OPERATORS
Top players
Highest performers in the Object 257 on NA
- #1TriiggErZzdowN117 battles3,142
- #2bean_pegasus130 battles3,034
- #3Wrt_Sk111 battles2,964
- #4DeusVult501122 battles2,956
- #5German_intelligence104 battles2,914
- #6_Supah105 battles2,872
- #7dr_ice101 battles2,841
- #8altshyppen1100 battles2,766
- #9TheCaptainNapalm113 battles2,702
- #10J00pr_YourMomsBoyfriend112 battles2,653
A-06 · VIDEO INTEL
Video reviews
Curated reviews, replays, and guides from veteran players
A-07 · SIMILAR HULLS
A-08 · CHANGELOG
Balance changelog
Patch-by-patch changes to this tank
- 2.0Sep 1, 2025
- ·EngineV-2-54IS→V-2-54 (257)
- ·Power700→75050
- ·Engine2x V-16 (1000)→2x V-16 (257)
- ·Vehicle durability1800→1900100
- ·Vehicle durability1900→2000100
- ·GunIS-3 (257) / 122 mm BL-9→IS-3 (257) / 122 mm BL-9 (257)
- ·
