
Object 257A 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.
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122 mm BL-9 (257) (damage per shot: 390):
122 mm BL-13-1 (257) (damage per shot: 440):
655
883
1102
1286














122 mm BL-9 (257) (damage per shot: 390):
122 mm BL-13-1 (257) (damage per shot: 440):
Expected
frags:
0.86
Expected
spot
1.11
Expected
defense points
0.57
Expected
winrate
51.98%
















Tier VIII field modification
available for tier X tanks
+3% to vehicle hit points
+1% to engine power
+7% to maintaining speed when crossing all terrain types
-5% to hull traverse speed
-10% to suspension durability
-3% to the aiming circle size
-5% to aiming speed
+3% to view range
+15% to additional stun duration
+10% to stun duration