The signature weapons of Selene (Kate Beckinsale) are two Beretta 92FS handguns modified to fire on full auto with barrel weights attached, possibley standing in for compensators.
While at the mansion's shooting range, Selene (Kate Beckinsale) can be seen firing a Heckler & Koch USP Compact along with other weapons. A vampire during the subway shootout is also seen using one.
A Heckler & Koch USP-9 is given to Michael Corvin (Scott Speedman) by Selene (Kate Beckinsale) when he is chained to a chair at the safehouse, and attempts to free himself by shooting the chain with the gun but fails.
A Heckler & Koch USP Match makes its first appearance when it is given to Selene (Kate Beckinsale) by Kahn (Robbie Gee) to test out. When she fires it, silver liquid comes out of the target, and we learn that the gun is loaded with Silver Nitrate bullets which were copied from the Lycan's ultraviolet ammunition, and are very lethal to the werewolves as it allows silver to flow into their blood stream. Towards the end of the film, Kraven (Shane Brolly) also uses a USP Match loaded with the same ammunition. It should be noted that silver nitrate is actually clear in liquid form. The movie uses something that looks more like mercury
Many Lycans (werewolves) in the film use nickel plated IMI Desert Eagle Mark VIIs chambered in .44 Magnum as their handguns. They are loaded with hollow bullets filled with a special irradiated fluid that emits ultraviolet light: "Sunlight used as a weapon." Selene takes a Desert Eagle loaded with the special bullets off a Lycan warrior, Trix (Todd Schneider) in the beginning of the film. Lucian (Michael Sheen) also has one at the end of the film.
In addition to her Beretta 92FS handguns mentioned above, Selene (Kate Beckinsale) also uses a pair of two tone Walther P99s fitted with Kemmer Tech BA-5 laser sights at the bottom of the barrels. The guns have been modified to lessen the weight required on the trigger to fire, allowing Kate Beckinsale's character to fire them almost as if they were fully automatic, which the sound editors for the film must have decided they were, since the weapons report like submachine guns.
During the scene when Selene (Kate Beckinsale) is discussing the war between Lycans and Vampires, it cuts to a gun rack, where an unknown submachine gun is seen, in my opinion this gun could be an unloaded Spectre M4, but im not to shure.
Heckler & Koch MP5K (with and without PDW folding stock)
Most of the vampire death dealers in the film use Heckler & Koch MP5K submachine guns both with and without PDW folding stock. Since they lack the extended barrels, they are not MP5K-PDWs.
Both the Vampires and Lycans can be seen using Heckler & Koch MP5A3s on several occasions. And the way to tell the two side's MP5A3s apart is that the Lycan's guns usually have tactical flashlights on the foregrip.
In the firefight at the beginning of the film, Raze (Kevin Grevioux) uses two Steyr TMPs to battle the vampires in the subway. Several are also seen in the vampire armory.
After the firefight in the subway, the Lycan leader Lucian (Michael Sheen) breaks up a fight between two werewolves by firing a Franchi SPAS-12 shotgun with a shortened barrel and magazine tube in the air and telling them that they are behaving like rabid dogs. A Lycan is also seen loading one up before the final battle.
During the scene where Selene (Kate Beckinsale) is discussing the war between the vampires and the Lycans, and when the the Lycans are loading up, several AKMs can be seen being handed out. They are also seen layered up in a gun rack, although some of these may be milled reciever Norinco Type 56 rifles.
During the scene when Selene (Kate Beckinsale) is discussing the war between Lycans and vampires, it cuts to a gun rack, where an M16A1 with A2 handguards is seen with many other weapons. One is also seen in the vampire armory.
During the scene when Selene (Kate Beckinsale) is discussing the war between Lycans and Vampires, it cuts to a gun rack, where an Enfield L85A1 is seen with many other weapons.
Towards the end of the film, Kahn (Robbie Gee) can be seen with an M4A1 Carbine, fitted with a scope, a laser pointer and a Surefire M500AB tactical flashlight in the foregrip. The lower receiver lacks the "fencing" around the magazine release, which means it's actually an M4 barreled upper receiver mounted onto an early Colt SP1 (original M16) lower receiver. Since so many SP1 lower receivers were converted to full auto fire (for movie use) in the last three decades, this is a common practice.
During the scene when Selene (Kate Beckinsale) is discussing the war between Lycans and Vampires, it cuts to a gun rack, where a Steyr AUG A1 is seen with many other weapons.
