David Mamet incorporated a number of real-life experiences from various U.S. special forces members for the production, including
Eric L. Haney who had served in highly classified operations during his 20-year military career. Haney's experience included front-line combat units as a combat infantryman, as an Army Ranger, and as a founding operator within the elite Delta Force under Colonel Charlie Beckwith. These experiences helped Haney effectively serve as a technical advisor, weapons expert, and actor's mentor to
Val Kilmer, ensuring that Kilmer reflected an accurate depiction of a special forces operative in every capacity. Haney retired as a highly decorated Sergeant Major, and his documented experience also includes security surveys, metro SWAT team arms training, oil company guard force management, executive protection, and the recovery of American children kidnapped and taken overseas.
