First flown on 24 July 1988 the Stalker is a military training version of the Glasair III, an all-composite, cantilever, low-wing monoplane. The Stalker is powered by a 4200NaN0 Allison 250-B17D turboprop driving a three-bladed metal tractor propeller. It has a retractable tricycle landing gear and the enclosed cockpit has two seats side-by-side with dual controls and a zero/zero pilot extraction system. The Stalker has two underwing hardpoints outboard of the landing gear for military ordnance. The prototype was destroyed in a fatal accident on 29 May 1989.