Currently there are 21 native Telephoto Zoom lenses for Pentax KP and all of these lenses are autofocus (AF) type.
KP also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on KP.
Since Pentax KP has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 9 Telephoto Zoom lenses with Weather Sealings.