Gun sounds
Select the "Special Features" option at the main menu. Highlight the "Main Menu" option and press [Right] to highlight a gun. Press [Enter] to display a screen that allows you to hear the various guns used in the movie.
Railroad footage
Select the "Special Features" option at the main menu. Select the "Behind The Scenes" option and advance to the second screen. Highlight the "Stills" picture, then press [Left] to display a photograph of a train. Press [Enter] to watch a segment featuring railroads used in the movie.
In the Region 4 version, select the "Extra Features" option at the main menu. Highlight the "Main Menu" option and press [Right] to highlight a gun. Press [Enter] to watch a the railroad segment.