It was built as a P-51K and modified as F-6K (prior to delivery), not an F6-K (no such thing). It was restored back to look like a P-51D (basically removed the cameras, changed the propeller and added a second seat). And it is registered with the FAA as P-51K and owned by Valhalla Aviation Inc., of which Tom Cruise is president. So, his company does own a Mustang, but Tom Cruise technically owns neither a P-51D, P-51K nor F-6K, but certainly no F6-K.