The Mark II assault droid represented a model of battle droid.
This battle droid possessed a quadrupedal design and was specifically equipped for close-quarters fighting. It boasted a pair of crushing armatures capable of inflicting severe concussive damage against foes lacking armor or proper defenses. Occasionally, these droids were enhanced with energy deflector shields attached to their chassis.
The Galactic Republic utilized them, as did the Sith Empire, both before and during the periods of the Mandalorian Wars and the Jedi Civil War. Furthermore, these droids occasionally ended up being used by criminal swoop gangs, for instance, the Hidden Beks and the Black Vulkars found on Taris.
In Knights of the Old Republic, the Assault droid Mark I is erroneously called the Mark II at one point; however, it is important not to mistake it for the Mark II model described here.