The Mark III Cerberus features better armament, protection, and mobility.
Replacement of all armour to steel-graphene-chobham.
5 mm of extra spall liner and inert inserts.
Replacement of all armour to steel-graphene-chobham, 30 mm extra thickness on all sides
10 mm more of spall lining and inert inserts
Wider turret ring
Improved radio, more space in turret
-Replacement of the 6 inch calibre gun seen in the MKII to the OQF-R 5.5 inch rifle, firing a projectiles of equal mass to the 6 inch gun, but at higher muzzle velocities, OQF-R 5.5 in rifle ammunition: HESH, APSCC (Armour piercing sabot cermet core, designed for medium to thick armoured targets, the sabot will only leave the softer jacket if it doesn't penetrate wholly), UHEF (Universal, High Explosive, Fragmentation, similar to Bofors Smart ammunition, around 700 ball bearings, steel core, copper coated, 10 mm diameter), UHEF-I (same as previous, but contains 60 % copper core, magnesium coated ball bearings, and a napalm-thermite charge), smoke, LRAT, LRAS, and LRAA missiles.
-changed positions for top mounted machineguns, added a special 350 mm launcher for various purposes, from demolition, to minelaying, drone deployment and flare barraging.
-Added a magazine system, the loader only selects what kind of ammunition to use and sets it in front of the pre-loaded propellant cell, it will fire 110 consecutive shots this way before having to return to restock.
-replaced the 16 cyl. flat, for a 16 cyl double flat, hemispherical cylinder design and a multi fuel system, 2050 HP, 6150 NM torque @ 5000 rpm.
-replaced the 8 speed gearbox for a 7 speed heavy duty robotic assisted.
-Added one roadwheel, added two return rollers
-85 km/h an 50 km/h speeds, on road and off road respectively, 35 km/h underwater.
Extras: interior big enough for crew to sleep inside, compartments for each crew member can be sealed off each other, outer space and underwater survivability time extended to two weeks, strengthened and revisited structure allows it to survive nuclear, biological, chemical and environmental threats.