Driver's and engine-transmission compartments are located in a front part of the hull, fighting compartment with rotatory turret - in middle and rear parts of the hull. The armour is welded rolled steel. Howitzer is equipped with R-123 radio set, R-124 intercom, automatic NBC system with filtration unit and fire-fighting equipment. The V-59 12-cylinder four stroke water-cooled diesel engine connects with a mechanical twin gear transmission, a gear box is in one block with a planetary steering gear. SO-152 has self-entrenching equipment which allows to prepare a trench within 20-40 min.
The crew consists of 4-6 men: a driver, a gunner, a loader, a commander, and two ammunition bearers, which are positioned to the rear of the vehicle feeding rounds through two hatches in the hull rear when in masked firing position.