Like the Mark XV Bolo, the Mark XXI was a very diverse mark. It contained a Mark XXI/I stealth forward reconnaissance unit, and a 20,000-ton heavy bolo.
Road Speed: varies
Sprint Speed: varies
Main Armament: 1 60cm Hellbore, varying VLS Missile System
Secondary Armament: 16 Ion-Bolt Infinite Repeaters, 4-8 30 Breech-Loading Mortars
Indirect Fire: varies
Other Bolos from same time period: none