HK-51 series assassin droid

HK-51 assassin droids were advanced versions of HK-50 assassin droids that were manufactured by G0-T0 in the HK Manufacturing Plant. Their appearance was almost identical to HK-50's; the only noticeable difference was the colour of the photoreceptors, light blue instead of yellow.

Behind the scenes
In a removed part of Star Wars: Knights of the Old Republic II: The Sith Lords, HK-47 would confront G0-T0 on Malachor V, and a group of HK-51 droids would come and help him defeat G0-T0. The HK Manufacturing Plant was also a removed part of the game.

Appearances

 * Star Wars: Knights of the Old Republic II: The Sith Lords (removed due to time constraints)