It was found during the battles in North Africa that the main tanks used by the Italian Army were very inadequate. The main gun in the L6/40 was just a 37 mm. The Semovente L.40 da 47/32 was built upon the L6/40 chassis intending to get a stronger gun into combat.
Some were converted to command versions with 8 mm machine gun made to look like larger caliber gun.
The Semovente L.40 had a 47 mm L/32 anti-tank gun as its main armament set inside a box like superstructure. It was based on the Austrian Böhler gun.
It fired a 3.25 lb AP shell at a muzzle velocity of 2,100'/sec.