In November 2006, Rocketplane Kistler and Alliant Techsystems announced that Alliant Techsystems would become the lead contractor for Rocketplane Kistler’s K-1 launch vehicle.
З 8 листопада 2006 Rocketplane Kistler і Alliant Techsystems оголосила, що Alliant Techsystems стане головним підрядником за К-1.