XT-8 was a XT labor droid which had been modified to be an assassin droid. He was painted a dull green and given photoreceptors which glowed with an evil, red light as well as a vocabulator which produced a buzzing, barely coherent voice. XT-8's personality matrix was crude even for an assassin droid by the time of the Galactic Civil War, though the XT model was high technology around 20,000 BBY. During combat, XT-8's chest panel would swing apart to reveal a submachine gun which could fire 180 degrees to the front.