The ZiS-42 was a Soviet half-track truck developed on the basis of the ZiS-5 model. During World War II, it was used not only as a transport vehicle but also as a platform for improvised self-propelled guns. 

One such solution involved mounting a 57-mm ZiS-2 anti-tank gun on the cargo bed, creating a light, fast, and mobile tank destroyer.

 Vehicle Specifications

• Chassis: ZiS-42 (half-track, improved off-road traction)
• Armament: 57 mm ZiS-2 anti-tank gun
• Crew: 4–6 soldiers
• Role: light tank destroyer / mobile anti-tank gun
• Service period: 1942–1944 (mainly improvised frontline units)

 Design and modifications on the truck’s cargo platform:

• A complete ZiS-2 gun mount was installed, often without major modifications,
• The floor was reinforced and anchor points were added,
• Side shields made of planks or sheet metal were installed,
• The gun was allowed to rotate over a wide range,
• The crew operated the gun while standing on the truck bed or on lowered steps.