More than 5,000 MiG-23s of all types were built. The MiG-23MS was designed for export and was equipped with a less sophisticated radar housed in a smaller radome. The USAF's 4477th Test Squadron, the "Red Eagles," flew this aircraft during Project Constant Peg providing realistic adversary training for US pilots. It is likely an ex Egyptian AF aircraft and was transferred to the museum in February 2017

On display in the Cold War Gallery at the National Museum of the U.S. Air Force. This is the export version of the MiG-23 that was less capable than domestic Soviet versions. It was flown by the 4477th TES, nicknamed the "Red Eagles", which also evaluated the MiG-17 and MiG-21 under Project Constant Peg over the Tonopah Test Range. The Soviet aircraft were used to simulate realistic adversaries, helping American aircrews to gain skill and confidence to defeat these threats. Constant Peg ended in 1988.