Rola and operational philosophy:
Since in the coming decades, most of humanity will live in urban areas, the tank should have the ability to operat in urban sprawls. This means it has to be able to:
1. Survive hits from small arms (RPG, etc) which will become increasingly powerful and render most armour useless.
2. Be highly manoueverable, as cities will have narrow lanes.
As you can see, these two conditions are mutually contradictory, as:
Point #1 follows the 'Hit survival' philosophy of big tanks. (Arjun tanks)
Point #2 follows the 'Hit avoidance of small, lightweight and highly mobile tanks. (T-90)
Armament (my favourite):
1. 205 mm main gun. This would be necessary because the tank would need to knock down buidlings and walls to flush out enemy combatants. For smaller calibre we can always use missiles

or rockets.
2. Rocket pod, mounted coaxially on the turret, to one side and a little above.
3. 30 mm gattlin gun, mounted as above, but on the other side.
4. Two flame throwers, mounted to each side to the front of the turrent to deter any enemy combatants from getting too close.
5. Laser blinders on theroof of the turret.
6. Coaxially mounted machine gun in the main body, to the front.
7. Grenade launchers.
8. Sheets of electric conductors on the surface of the tank, which can give lethal/non-lethal doses of joy to any individual who comes too close to the tank.
That's it. I have designed the armaments. The MBA's work is done. Now, I will leave the over worked but under appreciated engineers to fill in the rest.
