However, Revan was captured and his memory was erased before this plan could be realized, and the production on the HK-50 model ceased for several years. HK-47 became the basis for a new model of HK-series assassin droids: the HK-50, which were manufactured in a secret facility on Telos IV. After witnessing HK-47's abilities first-hand, Revan decided that more droids of this design would make efficient agents for his purposes.