In 1934 about 200 experimental models were built. Its based on GAZ-A but its longer and has an extra pair of wheels. Its main purpose is to carry 76mm cannon.
Because of hurry in designing the car had several problems. For example sometimes the brakes on the rear wheels got stuck, transmission whined. Soon the model was discarded as failure.
Fully loaded car weights 1500kg, top speed 63 km/h.