T-34-57 Medium Tank

Anticipating more heavily armored vehicles a 57 mm gun was mounted on the T-34. The vehicle was ultimately replaced by the T-34-85
Variants:

T-34 Model 1942 with 57 mm gun

1.
Name: T-34-57
Type: Medium Tank
Origin: Soviet Union
Year: 1941
Produced: 15

Length: 5.92
Width: 3 Meters
Height: 2.4 Meters
Weight: 26000 Kilograms
Speed: 54 km/h (25 km/h off-road)

Crew: 4

Primary Armament:
-57 mm ZiS-4 (model 1941 and 1943 were both used)
Secondary Armament:
-7.62 mm DT

Gun Flexibility:
31° Elevation

T-34 model 1941 with 57 mm gun

2° Depression

Armor:
-Hull
45 mm Front
45 mm Side
42 mm Rear
20 mm Top
16 mm Bottom
-Turret
45 mm Front
45 mm Side
45 mm Rear

Sources:
http://www.aviarmor.net/tww2/tanks/ussr/t-34-57.htm
http://tankarchives.blogspot.com/2013/07/soviet-57-mm-guns.html