2016 Bullet RVs 248RKS 2016 Keystone Bullet 248RKS Easy to tow with the new more fuel efficient crossovers, cars and trucks, the Bullet Ultra Lite travel trailer heralds in a new generation of RVs. Sleek and smooth on the outside and loaded with features and conveniences inside, the new Bullet Premier Ultra Lite will set you free to explore the open road.