BA-6

The BA-6 (Russian: Broneavtomobil 6) was a heavy armored car developed in the Soviet Union in 1936, based mostly on BA-I,followed by a slightly changed model BA-6, same turret as in the T-26 m 1933 and BT-5 tanks, and also equipped with the 45 mm main gun.

BA-6 followed with 386 cars produced between 1936 and 1938 in Izhorskij factory. 

Production was based on the Ford-Timken chassis, a 6×4 modification of the US Ford AA 4×2 truck, This batch was built on Russian version of the same chassis - GAZ-AAA, used  BA-6. 

The biggest limitation of the BA-6 is externally very similar to the BA-3, but except door the rear of the hull. 

New is GK tires, filled with sponge (porous rubber), and thus much less vulnerable to small-caliber fire. On the downside, the tires reduced both the speed and range of the vehicle, despite it had a somewhat thinned armor. 
Thin armor made them vulnerable to heavy machine gun fire and small caliber cannon fire.

A prototype railway BA-3ZD variant was created in 1936, but was not accepted for production. 

The BA-6ZD was produced in limited numbers.

The BA-6 were used in combat in the Spanish Civil War, against the Japanese in the Battle of Khalkhyn Gol, in the Finnish Winter War, and against the Germans in the early stages of the Eastern Front.

The BA-6 were used in combat in the Spanish Civil War, against the Japanese in the Battle of Khalkhyn Gol, in the Finnish Winter War, and against the Germans in the early stages of the Eastern Front. 

Ironically, the German Army used a few Spanish-built six-wheeled armored cars that were close copies of the BA-6 series. 

Later in the war time, Red Army's heavy scout vehicle role by light tanks, such as the T-60 and T-70.

A few captured BA-6 cars were used by Finnish army, under designation BAF B.