Several Warhammer 40,000 units got their start as dedicated Kill Team kits - 

and now six of them return as regular multi-part plastic kits to continue the fight in your Warhammer 40,000 army. The Kroot Farstalkers, Navy Breachers, Exaction Squad, Fellgor Beastmen, Raptors, and Kasrkin can all be added to your collection.