M181 Armoured Security Vehicle

The M181 Cougar Armoured Security Vehicle (ASV) is an internal security vehicle produced for the UNSC Defence Force by AMG Transport Dynamics, based roughly upon the design of the. It is armed with two M460HB grenade launchers dual-mounted in a turret, and possesses two M247B machine guns, one coaxial and the other pintle-mounted on the gunner's hatch, as a secondary armament.

Although initially designed primarily for use by UNSCDF military police (MP) and gendarmes, the Cougar saw extensive use throughout the Human Civil War and Human-Covenant War due to its greater protection and heavier armament as compared to the more common M12 FAV.