The book which Bob Lee Swagger reads in his home is 9/11 Commission Report.
The high caliber rifle that Swagger owns and is framed with is a Cheyenne Tactical M200 Intervention. It fires a .408 caliber projectile accurately out to and beyond 2000 meters. The CheyTac M200 is also available with a Long Range Rifle System, which consists of a laser range finder, magnifying scope with night vision capability, and a weather-sensing module, all of which interface with a PDA running ballistics calculation software.
The portraits on the walls in the room where the conspirators meet in Langley, Virginia are all of Republican presidents.
In the scene after Sarah Fenn first talks to Nick Memphis, Bob Lee Swagger (Mark Wahlberg) is seen standing outside with an Eagle's hat and jacket on. Mark Wahlberg plays for the Eagles in the movie Invincible (2006).
Theatrical trailer features a scene not used in the film where a small jet is blown up via remote control.
Shipped to some theaters under the name "Stars".
This was the final film to play the landmark Mann National Theater in Westwood, CA before it closed on April 20, 2007.
Athens, Tennessee, the residence of the firearms expert Swagger and Nick visited, was the location of the "Battle of Athens" where in 1946 armed citizens removed the corrupt local government and restored free elections.
The left-wing website zmag.org can be seen on Swagger's laptop while he is reading the 9/11 Commission report. Zmag publishes articles by, amongst other academics, Noam Chomsky.
The FBI agent helping the shooter is wearing a Che Guevara T-Shirt in a scene.
Swagger's wristwatch is a Suunto Vector, a digital watch made in Finland. Besides telling time, it also has an altimeter, barometer, and digital compass.
Keanu Reeves was the original choice to play Bob Lee Swagger.
Mark Wahlberg had to lose 20 pounds to give Bob Lee Swagger the slim and ripped look of a field sniper to make the film more realistic.
The sudden cut to the Montana Senator shows him firing a shotgun near the camera in hunting gear very similar to Dick Cheney; he then sits next to a large table embroidered with 'CMF'.
Stephen Hunter, the author on whose novel the film is based, is a Pulitizer Prize winning film critic for the Washington Post.
Mark Wahlberg's character's last name (Swagger) is a derivation of a Marine scout/sniper's slang for a quick calculation of a bullet's trajectory, which is SWAG (sophisticated wild ass guess).