Object 277
Tier 10 · ussr · heavy
About
Developed from 1956 through 1958 at the Kirov Plant, Leningrad, under the supervision of Joseph Kotin. Two prototypes were produced and underwent trials from 1959 through 1960. A hull and a turret were produced for testing for shell resistance. The development was discontinued in the summer of 1960 due to insufficient development of certain systems and components. In addition, the vehicle did not demonstrate any advantage over the Object 770 heavy tank.
Survivability
Hit points
2,300
View range
400 m
Signal range
730 m
Engine fire chance
12%
Armor (mm)
Front
Sides
Rear
Hull
140
120
50
Turret
290
224
80
Gun · 130 mm M-65
Caliber
130 mm
Rate of fire
5 rpm
Reload
12 s
Aim time
2.3 s
Dispersion @ 100 m
0.36 m
Gun arc
6° / 16°
Traverse
30°/s
Ammo
35
Mobility
Top speed
55 km/h
Reverse
15 km/h
Engine
950 hp
Power/weight
17.3 hp/t
Hull traverse
34°/s
Turret traverse
32°/s
Shells
ARMOR_PIERCING
490 dmg (368–613)
265 mm pen (199–331)
HOLLOW_CHARGE
490 dmg (368–613)
340 mm pen (255–425)
HIGH_EXPLOSIVE
640 dmg (480–800)
65 mm pen (49–81)
Marks of Excellencesample size 82 · updated 5/23/2026
1 mark
1,808
avg damage
2 marks
2,527
avg damage
3 marks
2,695
avg damage
golden (100%)
3,050
avg damage