The 507th Air Refueling Wing of the Air Force Reserve Command (AFRC) is one of two Air Force Reserve flying units in the state of Oklahoma and administratively reports to Fourth Air Force (4 AF). The wing operates twelve KC-135R "Stratotanker" air refueling aircraft at Tinker and is operationally gained by Air Mobility Command (AMC). As an associate unit, the 507 ARW also operates the Federal Aviation Administration's (FAA) British Aerospace 125-800 aircraft (ex-USAF C-29A) in the aviation standards and navigational aid inspection mission.