 "Sōryū"s primary anti-aircraft (AA) armament consisted of six twin-gun mounts equipped with 40-caliber 12.7-centimeter Type 89 dual-purpose guns mounted on projecting sponsons, three on either side of the carrier's hull.The guns had a range of , and a ceiling of at an elevation of +90 degrees.Their maximum rate of fire was fourteen rounds a minute, but their sustained rate of fire was around eight rounds per minute.