What is the name of the Batmobile's main weapon in battle mode in Arkham Knight?

The Batmobile's main weapon in Battle Mode in Batman: Arkham Knight is the Vulcan Cannon. It is the vehicle's rapid-fire rotary weapon, designed for sustained damage against enemy drones, light vehicles, and other battlefield targets.

Battle Mode transforms the Batmobile from a pursuit vehicle into a heavily armed tank. The car can rotate and strafe independently of its direction of travel, letting Batman track targets across a full 360-degree field. The Vulcan Cannon is the weapon players use for quick, continuous fire, while the 60mm cannon is intended for heavier direct attacks.

The Batmobile also carries missiles and a non-lethal riot suppressor, so “main weapon” can be misleading if interpreted as the vehicle's only weapon. The Vulcan Cannon is the standard rapid-fire gun, not the 60mm cannon. It is also distinct from Batman's handheld gadgets: Shock Gloves belong to Arkham Origins, while the Batarang and Grapnel Gun are personal tools rather than Batmobile armaments.