IS-3/Object 703 Heavy Tank

The IS-3 was a Russian tank that succeeded the IS-2. A prototype IS-3 was known as the Kirovets-1. The vehicle served with the Egyptians and were used in Hungarian revolution. The IS-3 had a modernized version called the IS-3M.
Variants:

Kirovets-1

1.
Name: IS-3/Object 703
Type: Heavy Tank
Origin: Soviet Union
Year: 1945
Produced: 2311 total

Length: 6.9 Meters
Width: 3.15 Meters
Height: 2.45 Meters
Weight: 46500 Kilograms
Speed: 40 km/h (17 km/h off road)

Kirovets-1

Crew: 4

Primary Armament:
-122 mm D-25T
Secondary Armament:
-12.7 mm DSK
-7.62 mm DT (1 or 2)

Gun Flexibility: °

Armor:
-Hull
120 mm Front

IS-3

90 mm Side
60 mm Rear
30 mm Top
30 mm Bottom
-Turret
250 mm Front
172 mm Side
172 mm Rear

2.
Name: IS-3M
Type: Heavy Tank
Origin: Soviet Union
Year: 1948

IS-3M

Produced: 2311 total

Length: 6.9 Meters
Width: 3.39 Meters
Height: 2.45 Meters
Weight: 49000 Kilograms
Speed: 40 km/h (17 km/h off road)

Crew: 4

Primary Armament:
-122 mm D-25T
Secondary Armament:
-12.7 mm DSKM

IS-3M

-7.62 mm DTM (1 or 2)

Gun Flexibility:
45° Elevation

Armor:
-Hull
120 mm Front
90 mm Side
60 mm Rear
30 mm Top
30 mm Bottom
-Turret
249 mm Front
172 mm Side
172 mm Rear

Sources:
http://ftr.wot-news.com/2013/10/15/is-3-historical-turret-armor/
http://www.militaryfactory.com/armor/detail-page-2.asp?armor_id=191
http://www.aviarmor.net/tww2/tanks/ussr/is-3.htm
http://www.tanks-encyclopedia.com/ww2/soviet/soviet_IS-III.php