122-mm self-propelled howitzer
Designed to defeat unsheltered and covered manpower and equipment of the enemy.
A significant level of mobility of the 2S1 is achieved due to use of the MT-LB amphibious chassis.
In order to increase rate of fire with available manual (separate) loading of the howitzer the mechanised ramming and ejection of cases is used. A modified gun of the D-30A towed howitzer equipped with an ejector is used.