ZQ Infantry Support Units represented a type of battle droid. These droids were created and produced by Sienar Intelligence Systems and saw service within the Imperial armed forces.
The ZQ model was specifically engineered to provide support to infantry units. It utilized a repulsorlift engine for movement and was equipped as standard with a pair of blaster cannons that possessed sufficient power to eliminate even armored troops. Additionally, it included a small concussion missile launcher. The ZQ also featured four extra hardpoints, enabling the attachment of supplementary weaponry to adapt to different mission requirements.
In the initial period of the Empire, these droids were commonly used. The Empire later stated that this droid series was eventually removed from service. Nevertheless, reports of their continued operation remained widespread. It was rumored that approximately twenty modified ZQs were deployed with Imperial storm commandos, specifically a group called the DeathWhispers. This unit was assigned to wiping out the inhabitants of Hyrol Preen Beta because of alleged Rebel presence on the world.