Stormboyz are Orks that fancy discipline and, equipped with Rokkit Packs, fulfil the role of jump infantry on the battlefield. Ork Stormboyz are the equivalent of greenskin shock troops. They have discipline above that of the average Ork and are more efficient too. Commonly viewed as being nutcases amongst regular Orks since they go into battle with fuel-filled rockets strapped to their backs. Orks usually distrust anything that flies and prefer to go to battle on their own two legs, but Stormboyz love nothing more than joining battle quickly, part of the reason they strap rockets to their backs.
From Felix’s collection and Games Day.