The Slaver Heavy Guard is exclusively located in Telbooze, the Slaver capital of southern Kenshi. They stand between players and the inside of the town, though they are not hostile unless they or the town is provoked. Despite their name, the only thing better about the Slaver Heavy Guard as opposed to a Slaver is heavier equipment, and a slight increase to the likelihood of it being standard grade. They exclusively wield Holed Sabres, which give them an inherent bonus to their defensive combat attribute. Despite their importance, they wield nothing greater than Ancient grade weaponry and shoddy (occasionally standard) equipment.
Players attacking Telbooze should expect these to be the first and foremost fighters in the battlefield. Their heavy weaponry means they can easily be avoided by more nimble fighters, and that they are much slower attackers.