The IS-4 heavy tank is a Soviet heavy tank developed in the late 1940s. Designed and licensed by Martial Brick Stacker, this product replicates the IS-4 heavy tank in 1:35 scale using dark grey bricks.

The IS-4 heavy tank, codenamed "Object 701", weighs 60 tons and is armed with a 122 mm towed tank gun and two 12.7 mm automatic firearms. Powered by a B-12 Type V four-stroke diesel engine with a maximum power of 750 hp, it can reach speeds of up to 43 km/h on the road and has a maximum range of 170 km. Development began in 1943, the design was completed and mass production began in 1947. The IS-4 entered Soviet service in late 1948 and remained in service until the late 1970s.