NOTE: The film is edited in a very distinctive style, with some sections appearing very grainy, some in B&W, and others in different color filters. If some pictures look grainy or distorted, it is the way they appear in the film.
The following firearms were used in the film Natural Born Killers:
Mickey Knox (Woody Harrelson) uses a Beretta 93R during the opening murders in the diner. He later uses it alongside his .475 Wildey Magnum during the drug store shootout.
A policeman shown during the opening credits of Wayne Gale's show "American Maniacs" has a Ruger Service Six. Another cop with him has a SIG-Sauer pistol.
Remington 870 (customized)
During the first part of the film, Mallory Knox (Juliette Lewis) is seen using a highly customized Remington 870. The "Mickey" actor (Mark Harmon) also uses the Model 870 when shooting a cop in a re-enactment for "American Maniacs".
Also on the report about Mickey and Mallory is a shot of Mickey (Woody Harrelson) wielding a customized Remington 870 with a heat shield, Mark 1 bayonet mount, and extended magazine tube on a gun store's security camera during a mass murder. 870's in a similar configuration can be seen in Training Day and The Marine.
AMT Hardballer Longslide
A cop pursuing Mickey and Mallory in the re-enactment on "American Maniacs" carries a AMT Hardballer Longslide.
When the drug store clerk is watching the TV report about Mickey and Mallory, a Smith & Wesson Model 36 can be seen on the TV screen. Several detectives at the drugstore can also be seen with Model 36 revolvers.
Wildey Magnum
Mickey Knox (Woody Harrelson) uses a .475 Wildey Magnum during his murder of the drug store clerk and subsequent shootout with police, carrying and firing it alongside his Beretta 93R machine pistol.
Smith & Wesson Model 15
One of the police officers carries a Smith & Wesson Model 15 during the shootout/standoff at the drug store.
Many of the other police officers at the drug store shootout carry Beretta 92FS pistols. Some of the prison guards during the riot scene also carry Berettas.
IMI Desert Eagle Mark VII
Det. Jack Scagnetti (Tom Sizemore) carries a chrome Desert Eagle, which fits his flashy personality. Mallory Knox (Juliette Lewis) later uses it to shoot him during the prison riot scene.
Ruger AC556 Carbine
Some of the policemen and prison guards use Ruger AC556 Carbines to try and quell the riot.
Glock 19
During the prison riot, Wayne Gale (Robert Downey Jr.) gets ahold of a Glock 19, most likely from a murdered prison guard, to shoot at the police and guards when he "teams up" with Mickey and Mallory.
Mallory Knox (Juliette Lewis) carries a nickel SIG-Sauer P226 during the prison riot, using it to threaten the life of Wayne Gale in front of Warden McClusky. It is most likely that she stole this pistol from a prison guard, as the female guard in the last screencap can be seen with one.
Glock 17
One of the prison guards towards the end carries a Glock 17, aiming it at Mickey and Mallory.