From Lexicanum

The Land Raider Ares is a Land Raider variant created by the Dark Angels Chapter. It was first used in the siege of Ares when it was discovered by the Dark Angels that some of their chaotic brethen had taken control of the local forces.

The Dark Angels found that their Vindicators could not withstand the great cannons of the city and so created a Land Raider that could mount a Vindicator cannon. This machine is perfected for city battles and the plans have now been allowed the status of "official Land Raider".

Weapons Configuration

• Hull-mounted Demolisher Cannon
• Hull-mounted twin-linked Assault Cannon
• Two sponson-mounted twin-linked Heavy Flamers
• Dozer Blade

Sources

• Space Marines Apocalypse Datasheet - Land Raider Ares.pdf

Space Marine Vehicles

Rhino Chassis	Rhino • Damocles Command Rhino • Razorback • Vindicator • Whirlwind • Predator Annihilator • Predator Destructor • Baal Predator • Sabre Tank Hunter
Land Raider Chassis	Land Raider • Land Raider Crusader • Land Raider Redeemer • Land Raider Helios • Land Raider Prometheus • Land Raider Ares • Land Raider Terminus Ultra • Hellfire Land Raider • Land Raider Spartan
Dreadnought Chassis	Dreadnought • Furioso Pattern • Mortis Pattern • Ironclad Dreadnought • Siege Dreadnought • Venerable Dreadnought • Grey Knights Dreadnought
Land Speeder Chassis	Land Speeder • Land Speeder Tornado • Land Speeder Typhoon • Land Speeder Tempest • Land Speeder Storm