The Hydra Flak Tank, also known simply as the Hydra, is the main mobile anti-air artillery piece of the Astra Militarum. It is produced on hundreds of Forge Worlds across the Imperium and is widely-used in nearly every regiment. The Hydra, like many other Imperial military vehicles, is based on the Chimera armoured personnel carrier chassis, and is armed with a set of twin-linked Hydra Autocannons. Hydra Autocannons are a set of long-barrelled Autocannons mounted on a turret with highly sophisticated tracking and targeting equipment.
The Hydra’s main role is defending mobile Imperial Guard attacks from the unwanted attentions of enemy aircraft. Even in the abscence of airborne threats, the Hydra’s long barrelled auto-cannons are still a potent weapon against lighter vehicles and infantry.