In an attempt to increase tank output in summer of 1941, the Kharkov Tractor Zavod (KhTZ) installed one inch armour plates around the STZ-3 that was already in production since 1937. On top came a 45 mm gun turret resulting in the new KhTZ-16. However, only a mere 50-60 samples were finished until the Germans captured KhTZ in October of 1941.

Quantity: 50-60 (1941) - Crew: 2 - Primary Armament: 1 x 45 mm Mod. 32 Gun - Primary Armament: 1 x 7.62mm DT Machine Gun
Weight: 7000 kg - Lenght : 3.70 m - Width: 1.86 m - Height: 2.21 m
Engine: 52 hp 4-cylinder gasoline or kerosene engine - Maximum speed: 8 km/h - Range: 50 km
Max. Armor Thickness: ? mm