The Vaptix R-1S "Harrasser" is a light armed scout that is technically classified as a "medium weight" model due to the oversized laser that is the standard equipment on its articulated universal mount. The R-1S is designed to excel at navigating exceptionally rough terrain such as volcanic mountains or city ruins. Multiple units can be wirelessly networked together with "pack" behavior software, and multiple packs can in turn be interfaced to act as a "flock." The Harrasser generally operates on four legs, but its hind legs can reverse for two-legged operation, handy for transportation and storage.
In practice, Harrassers have been mostly used as solo perimeter defense units around the hideouts of the Hero Factory's enemies.