| Year | Weight | Primary Armament | Second Armament | Indirect Fire | Self Aware? | ||
| Mark XI | 2235 | 350 | 70/70 | 1 18cm railgun | 12 laser InfRpt | none | no |
BOLO MK XI
The Mark XI was essentially a backup, designed to cover the possibility that the Mark X's laser main armament might prove impractical in service. Main armament was one 18cm railgun firing depleted uranium long-rod penetrators in the antiarmor role and a wide range cluster, incendiary, chemical, and fuel-air rounds against unarmored tartget. Otherwise, the Mark XI was identical to the Mark X. This vehicle remained in service longer than might otherwise have been anticipated because the projectile-firing capability of its main gun proved extremely popular with tacticians.