It is lightly armed with only a single Heavy Stubber, but tends to carry weapons teams and heavy mortars. The Centaur is a light vehicle used to transport men and ammunition or tow light artillery pieces. The vehicle is usually deployed by the Guard during sieges of fortified enemy emplacements and against structures being used as cover by the enemy during urban combat. The Colossus is an open-topped self-propelled artillery piece commonly used by the regiments of the Imperial Guard, and it is one of the oldest and most renowned siege weapons still in use during the 41st Millennium. The Bombard has no room on board to store its ammunition, and thus it must be loaded from outside the vehicle using its rear-mounted crane.

Its use is rather limited due its short range and lack of direct fire capability it is primarily used on fortresses after the fortress's occupants are forced inside their walls. The Bombard is capable of ignoring cover when being used against fortified troops. Despite its comparatively short range, it is one of the most powerful artillery pieces in the Imperial Guard. The Bombard mounts a Siege Mortar on a Leman Russ main battle tank chassis. Consequently, Basilisks are often placed at the front of an artillery detachment. In the direst of circumstances, Basilisks may be used as secondary battle tanks if given adequate protection. Unlike the other artillery units in the Imperial Guard, such as the Bombard, Griffon, and Manticore, the Basilisk is capable of direct as well as indirect fire, giving it a limited ability to defend itself from enemy vehicles and infantry. Additionally, the guns produce a tremendous muzzle report, and it is also mentioned that Earthshaker crews tend to experience hearing loss. The Earthshaker shells are renowned for the powerful shrieking they make during flight, the mere sound of which is often enough to break enemy morale.

The Basilisk can fire its main weapon directly at an enemy, but this means the Basilisk would have to be close to the enemy which is not good considering it is lightly armoured, instead the Basilisk will stay away from the main fighting and fire its weapon indirectly. Basilisks utilise the standard Chimera chassis but replace the passenger compartment and turret with the Earthshaker, leaving it with the hull-mounted Heavy Bolter weapon and driver's compartment. The Basilisk mounts one of the longest-ranged weapons in the Imperium's arsenal, the Earthshaker Cannon. It is essentially an artillery piece mounted on a stripped-down chassis of a Chimera transport. The Basilisk is the most common artillery tank used by the Imperial Guard in the 41st Millennium. 1.37 Crassus Armoured Assault Transport.

Leman russ annihilator conversion