The first infantry support LVT. With the first experience of Pacific amphibious operations it was clear heavier firepower than the usual .50 in guns was needed. Based on the LVT-2, "A" standing for armored, this fire support version had a hull plated with of armor. It was fitted with a turret nearly identical to that of the Light Tank M3, with a 37 mm Gun M6 in an M44 mount, and also carried two rear-mounted machine guns, 509 units were produced. The vehicle's hull was covered in 6-12mm of armor plate, and the vehicle was powered by a air-cooled petrol engine. Despite the limitations imposed by the turret, it could still carry a limited payload of of cargo and had a quite respectable speed of on land and in water, and an operational range of on land or in water.