I see your M1 Abrams and raise you...
Dimensions:
Total Height: 22.5 m
Total Length: 41.1 m (w/ barrels)
22.1 m (w/o barrels)
Total Breadth: 24.0 m
Weight: 243.3 metric tons (unloaded)
285.5 metric tons (with ammunition)
Maximum running speed : 41 kph.
Maximum rolling speed : 52 kph.
Armament:
4 x Vickers mk6 406 mm autoloading, liquid fueled, liquid cooled cannons. The cannons, mounted on top of the mecha, can fire 1125 kg high-explosive (HE), 1300 kg armor-piercing (AP), 987 kg anti-aircraft (AA) or 1254 kg nuclear (SPN) shells at a rate of one shot per cannon every five seconds. The maximum range of the main armament is 21 km on Earth with the mecha at 0 degrees inclination. If the destroid is standing on an inclined surface, elevation of the barrels will be increased and the maximum range will be larger. At the optimum angle the maximum range will exceed 50 km, though accuracy will be limited at that range. The cannons can also fire directly at the enemy if there is a line-of-sight. The shell room can house 28 rounds.
2 x Raytheon LSSN-20G triple-tube long-range missile launchers built into the arms. Each tube can carry:
2x RMS-1 "Angel Of Death" nuclear stand-off missiles. The missiles have a reaction warhead (200 kT) and a range of 250 km at Mach 4.0 in the atmosphere. They are however optimised for space use, where they have a delta-v of 4.1 kps. Guidance is by multi-spectrum imager and active radar homing.
or 2x Firebird missiles. This missile has a conventional warhead mounted on the frame of a RMS-1 missile and a range of 180 km when fired from zero speed and altitude. It has a maximum speed of Mach 6.5, and is guided by a combined IIR and active/passive radar seeker