Tyrese Gibson plays U.S. Air Force Combat Controller Robert Epps (a member of Captain Lenox's special team) who supposedly holds the rank of Technical Sergeant (5 stripes, pay grade E6), but he's actually shown wearing the rank of a Chief Master Sergeant (8 stripes, pay grade E9).
Technical Sergeant (E-6)
Air Force Technical Sergeant (TSgt) The Technical Sergeant (TSgt) is the second level of the Non-Commissioned Officer (NCO) ranks in the Air Force.
Technical Sergeants are qualified to perform highly complex technical duties in addition to providing supervision. In addition, they're responsible for the career development of each subordinate under their supervision.
It is the TSgt's responsibility to ensure that all enlisted personnel have the tools, training and support they need to achieve maximum performance and accomplish total mission effectiveness.
The average Air Force wide active duty time for promotion to the rank of Technical Sergeant is 12 years.
Chief Master Sergeant (E-9)
Air Force Chief Master Sergeant (CMSgt) The rank of Chief Master Sergeant is the highest Air Force enlisted rank, with the exception of the Chief Master Sergeant of the Air Force.
The CMSAF is a distinctive rank with special basic and retired pay rates set by law. Chief Master Sergeants serve as managers and superintendents, advisors, enlisted force managers, and provide senior enlisted leadership.
Following selection, CMSgts are assigned Chief Enlisted Manager (CEM) codes and may fill any managerial-level position and perform all duties not prohibited by law or directive.
The average service wide active duty time for advancement to the rank of Chief Master Sergeant is more than 22 years. REF: From the Air Force Handbook
TSgt are typically in their 30's, whereas CMSgts are office pogues in their 50's. Is this just the result of poor understanding of military rank structure or a deliberate plot twist?