The Sergei Mironovich Kirov (SMK) was to meet the requirements that were put forth by the Directorate of Armed Forces (ABTU) in November 1937. These requirements called for a tank that could withstand shots from a 76.2 mm gun from 3,937' / 1,200 m. It was also to be powered by a diesel engine as it was felt petrol resulted in too large of fires when hit. The requirements also called for a tank with five turrets.
In 1938 the SMK was designed by Colonel Zh. Kotin / S.J. (Z.?) Kotin / I.S. Kotin (chief engineer of the Kirov-Zavod tank factory in Leningrad) to replace the T-35.
The SMK had a 76.2 mm gun in the main turret and a 45 mm gun in the lower turret. This layout was virtually the same as the T-100.
The engine was based on a German BMW aircraft engine.
The hull and turrets were cast armor.