HK-50 assassin droids were often able to successfully pose as protocol droids and they infiltrated much of the Galactic Republic fleet in doing so. Sometime after Revan's disappearance, production continued again under the planning droid turned crime lord G0-T0, who discovered the HK-50 manufacturing facility hidden on Telos IV and reactivated it, disseminating the newly created HK-50 droids throughout the galaxy searching for the Jedi.
The plan was hauled and production ceased after the Dark Lord was captured by the Jedi Council. Further modifying and improving the designs of his first HK model, HK-47, the HK-50s were to be used as saboteurs aboard Republic warships. The HK-50 droids were first designed and manufactured in secret by the Jedi turned Sith Revan for his war against the Republic. and, of course, they refer to meatbags as 'organics'.
