On 6 March 1915 the Russians ordered 60 vehicles of an improved design, known as Austin 2nd series. This time the chassis of a 1.5 ton truck with a more powerful engine was used. The hull was shorter, with thicker armour, the driver's cab roof was modified to improve machine guns' angle of fire. Less welcome was a removal of rear access door. The army also decided it wanted a rear driving post, so after arrival to Russia all vehicles were fitted with a redesigned rear hull section, which housed a second driving post and additional hatch. Another upgrade was the addition of side shields to the machine guns.