De Bruin, a Free Colorado company based in Denver (and a long-time supplier of parts to Hughes Aviation Engineering), began licensed manufacture of the Devastator in February 1937, including at-order customizing of the weapon load-out and engine specifications to meet each client’s requirements. The standard Mark III design is the basic configuration, but two standard variants have appeared in recent months. The first downgrades the craft’s speed in favor of armaments; the second downgrades the machine guns to twin 40-caliber Andersons in favor of greater rocket- and bomb-carrying capacity.