The bureau was gutted in the Great Purge and broken up by the beginning of the Second World War.
100 (unofficially named "Tankograd"), and continued the production of Kotin's design line.
A team led by German engineer Eduard Grote worked on a 100-ton design with 107 mm gun, four sub-turrets, and pneumatic suspension and servo-controls, called the T-41 or TG-5 [ru].
A slightly more practical "land battleship" was the T-35 heavy tank, designed by N. Tseits's team and inspired by the British Vickers Independent.
Also in 1934, N. Barykov and N. Tseits worked with graduate students from the Leningrad Technical Institute to modernize the multi-turreted T-28 medium tank by adding a Christie suspension.
(One of the Leningrad engineering students had been Mikhail Koshkin, the T-34's chief designer) In the 1930s, OKMO also designed a number of self-propelled artillery and antiaircraft guns, and tracked infantry, ammunition and fuel transporters, but only prototypes or trial batches of any were ever built, except for the T-26-T artillery tractor.
In 1936–37 OKMO designed the T-111 (or T-46-5), the first attempt at a Soviet tank with "shell-proof" armour, effective against more than just small arms.
A second prototype was made as a single self-propelled gun T-100Y, later designated SU-100Y, presently displayed in Kubinka Tank Museum.
The bureau started work on the T-50 infantry tank in 1939, but was gutted during the Great Purge.