The SU-14 was a prototype Soviet heavy self-propelled gun built on a T-35 chassis. The SU-14-1 variant of 1936 carried a 152.4 mm B-10 (also called 1935 model) naval cannon which could fire 43.5 kilogram shells at ranges up to 20 km. Its armour was 20 to 30mm thick. It never entered serial production.