A contract for the production of a turretless vehicle was concluded with the Bofors company in 1960. A total of 10 prototypes of the "zero series" were produced. The vehicles differed from the mass-produced Strv 103 in weaker armor and engine, as well as in the commander's cupola. In 1964, the vehicles were used as a basis for the Strv 103A production.
Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.