 As a " mobile reserve " there were 13 M13 / 40 medium tanks and 115 L3 / 35 tankettes . While the <unk> were generally worthless , the M13 / 40s were effective medium tanks with four machine guns and a turret @-@ mounted 47 mm antitank gun for its main armament that were " in many ways the equal of British armoured fighting vehicles " . However , their 20 mm armour , while much thicker than that of the tankettes , could still be penetrated by the British 2 pounder and the tankettes were no match for the British Matildas in either armour or firepower . None of the tanks at Bardia were fitted with a radio , making a coordinated counter @-@ attack difficult . 
