A M1911A1 with a Laser Products 310R flashlight (now SureFire) and wooden diamond grips (usually mounted on pre-1924 1911s) is the handgun used by James Dunn (Keenen Ivory Wayans) many times in the film. He steals from a SWAT officer during a raid. The LAPD SWAT used these guns for the reason explained in the Speed page. Dr. Victoria Constantini (Jill Hennessy) is seen pointing this weapon when Dunn returns to the hiding place after being chased by a running mob. To support his interpretation of a Marine, the actor keeps an excellent trigger discipline throughout the film. The handgun is unusually a military 1911A1 chambered in .45 ACP, a rare choice for a movie since 1911s used often are commercial versions converted in 9mm. In some minor scenes the pistol changes into a commercial Government Model with spur hammer, which anyhow retains the parkerized finish of the military version.
Beretta 92FS makes many appearances in the movie, since at the time of the film it was the standard issue of the U.S. Army and LAPD. Gen. Adam Woodward (Jon Voight) is seen using a Beretta 92FS in the final scene.
Assistant Deputy Director Spencer (Eric Roberts) carries a nickel plated Smith & Wesson 39 in his shoulder holster. The weapon is most noticeable when CIA Deputy Director Kenny Rackmill (Paul Sorvino) disarms him.
Soldiers use M16A1 with A2 Style Handguards. Capt. Steve Braddock (Wolfgang Bodison ) is seen several times use this weapon. In the final sequence, Dunn (Keenen Ivory Wayans) is seen to use one of these with laser and scope (in a typical Hollywood sniper rifle configuration).
During the first part of the film a take-down Sako M995 TRG-S is used by several characters, including Dunn (Keenen Ivory Wayans). In a typical Hollywood inventive, the rifle uses an ice ammunition. This is impossible and has been debunked on the tv program Mythbusters. Since there is no information of a take-down version of this rifle (a separation is notable in the half of the stock and the barrel) it is presumed that it is rare and is available in the film production armamentarium. Therefore this is probably the same rifle used in movies like Absolute Power, All About the Benjamins and many TV series.