Bravo Team's military experience
Although they are not DEVGRU operators, there are several actors with military experience who contribute much of their knowledge for the sake of greater realism in the show.
For example, Justin Melnick (Brook Reynolds or Bravo 5 in the show) as well as an actor he is also a police officer, and Dita "The hair missile" (as the dog Mark Owen speaks in his book "No easy day”) is his working dog. He joined the show as an advisor, but after a couple of interventions, he was added to the team.
Or Tyler Gray (Trent Sawyer or Bravo 4) who served in the 75th Ranger Regiment, 2nd Battalion as a sniper, and then as Delta until in 2005, an IED in Iraq caused him injuries that made him retire (does it sound familiar?)