I've been trying to get this done for AGES... This is simply a cross between a Leclerc, a Challenger, & a Merkava 4 tank.
The current-generation main battle tank in service of the Estelbachtian Royal Army, exclusively for the Cuirassiers (armored) units. Often for mobile field combat, urban roles are left to Urban Battle Tanks & Infantry Combat Tanks. Since Estelbach's isolationist policies with military force, these tanks have not yet been tested in combat.
A crew of 3 (driver, gunner, commander) serves on the tank. State-of-the-art technology allows the crew to serve via wide-range holographic cockpits provided by durable yet advanced sensor optics around the tank.
The main weapon is a 120mm rifled gun to fire smart projectiles & guided missiles against enemy armor & soft vehicles and fortifications, supported by a 3-barrel coaxial cannon. An optional gun is a 105mm coil gun of greatly improved range & accuracy while providing more room for additional ammunition. The latter weapon would not be used in any expeditionary formation.
The tank's defensive features include a combination of a layered armor of classified materials, targeting jamming systems, & a multipurpose active protection system, against missiles, rockets, enemy vehicles, and even swarming enemy soldiers. Optional additional protection includes a cage armor to counter nearly all projectiles.