Uulshos justice droid
Uulshos justice droids were assassin droids manufactured by Uulshos Manufacturing.
History
Justice droids were used years before the Clone Wars, and were so successful that they were reproduced by the Galactic Empire during the New Order. They were both strong and durable, and thus reliable to use.
Notable models
2-124
One of these droids was the Imperial assassin droid 2-124, that was captured by the Rebel Alliance. The droid escaped and killed a number of Rebel and New Republic officials over the years. It was placed in General Airen Cracken's confidential New Republic Intelligence brief listing the top fifty most dangerous beings to the New Republic.

Iron Knights
Some Uulshos justice droids joined with Force-sensitive Shards to form Iron Knights. The combination of a Jedi's use of the Force and an assassin droid's skills made them deadly combatants.
Behind the scenes
The justice droid's design is identical to the Eliminator 434 model of assassin droid as both are based on early concept art for IG-88.
Sources
- Wanted by Cracken
Droids, Technology and the Force: A Clash of Phenomena on Hyperspace (article) (content removed from StarWars.com; backup link)
- The New Essential Guide to Droids
- The Complete Star Wars Encyclopedia