Sin City is the 2005 feature film adaptation of the graphic novel series created by Frank Miller. The film was co-directed by Robert Rodriguez and Frank Miller. Many of the cast along with directors Rodriguez and Miller would return for the 2014 sequel Sin City: A Dame to Kill For.
The following weapons were used in the film Sin City:
The Springfield Armory M1911A1 is one of the most frequently used handguns in the film (Which are clearly seen on the slides of the guns). At the beginning of the film, The Salesman (Josh Hartnett) uses a G.I. model fitted with a sound-suppressor to kill a woman. Marv (Mickey Rourke) also packs a G.I. model, which he affectionately named "Gladys", after a nun in his Catholic school. Apparently he took the gun from a guy he killed at school based on the line "I stole her off the toughest guy I ever messed with, back in school. He was dead at the time, so he didn't miss her." -(From the graphic novel Sin City: The Hard Goodbye). "Gladys" is briefly seen held by Marv's parole officer Lucille (Carla Gugino). Detective Jack "Jackie Boy" Rafferty (Benicio del Toro) packs a single G.I. model with Pearl grips and Dwight McCarthy (Clive Owen) carries two matching G.I.'s with ivory grips. Along with all of them, several random extras such as thugs and Old Town prostitutes are seen with M1911A1s as well.
Douglas Klump (Rick Gomez) is the first character seen with the Beretta "Auto 9", aka the RoboCop gun. Hartigan (Bruce Willis) later takes Klump's Auto 9 and kills a cop with it at the Roark's farm. The Auto-9 seen in RoboCop was an actual Beretta 93R, but in the Sin City version of the gun, close inspection of the slide reveals a decocking safety of a Beretta 92FS, while a genuine 93R has a frame mounted safety, meaning this gun is a 92FS mocked up as an Auto 9. It was mentioned in a behind-the-scenes featurette that this particular weapon was used due to writer Frank Miller's involvement in the story for RoboCop 2 and RoboCop 3.
During the scene where Hartigan (Bruce Willis) is in a hospital room and Senator Roark (Powers Boothe) is telling him how he'll pay for shooting Roark Jr. (Nick Stahl), Senator Roark can be seen with a Colt Defender, Colt's compact 3" barreled 1911 variant - if you look closely you can see the Colt "Ponies" on the slide before and after the words "Colt Defender". It is clearly too small to be an Officer's ACP as it was previously listed.
Roark Jr. a.k.a. The Yellow Bastard (Nick Stahl) wields a Beretta 92FS when he follows Hartigan (Bruce Willis) to Kady's Bar and then fires it at Hartigan and Nancy (Jessica Alba) as they try to escape in her car. Several other thugs and Old Town prostitutes carry Berettas.
The first Walther P22 we see is in the hand of an Old Town prostitute, which is a nickel target model with laser. The next one we see is the one that Hartigan (Bruce Willis) takes from Shlubb (Nick Offerman) which is also two-tone and is seen being affixed with a suppressor by Shlubb when going to pick up Hartigan. Hartigan's Walther P22 is notably seen while it's on the the seat of the stolen Ferrari next to the Auto 9 carried by Klump (Rick Gomez).
In the beginning of the movie, Roark Jr. (Nick Stahl) carries a Colt Officer's ACP 1911 variant with a blued frame and stainless steel slide, which he uses to shoot Detective Hartigan (Bruce Willis) several times non-fatally and hold Nancy Callahan (Makenzie Vega) hostage but loses it when Hartigan blows his arm off on the dock.
In the beginning of the film, Detective Hartigan (Bruce Willis) uses a Smith & Wesson Model 29 .44 Magnum to rescue the young Nancy Callahan (Makenzie Vega), and also uses it to blow Roark Jr. (Nick Stahl) apart. Frank Miller made Hartigan use a .44 Magnum as an ode to Dirty Harry and felt the 5th film was a bad way to end the series, so he made this as his Dirty Harry. Note how Nancy's last name is "Callahan." Despite being a lefty in real life, Bruce Willis was nice enough to fake being a righty shooter for the film to stay faithful to the comics.
In the beginning of the film, Bob (Michael Madsen) shoots his partner, Hartigan (Bruce Willis) with a Colt Python in the back and chest in fear of the Roark family's wrath. A hitman holds a Colt Python to Marv's back in Katie's Bar, and an Old Town prostitute can also be seen wielding one. Strangely Bob fires 8 shots out of his six shot Python, versus only six in the book.
In the beginning of the film, Detective Hartigan (Bruce Willis) packs a Colt Detective Special in an ankle holster as his "Spare Rod". He attempts to use it when he is shot several times by his partner, Bob (Michael Madsen), but is only shot again when he attempts to pull it out.
When Hartigan (Bruce Willis) returns from being in prison for eight years and meets up with the now nineteen year old Nancy Callahan (Jessica Alba), she gives him a stainless steel Ruger Blackhawk which he uses during a shootout with Roark Jr. a.k.a. Yellow Bastard (Nick Stahl) in the throat, and during the rescue of Nancy at the Roark family farm. Nancy herself wears a pair of stainless Ruger Blackhawks and some old town prostitutes are seen with them, noticeably Dallas the black masked Prostitute (Patricia Vonne).
Manute's henchman Stuka (Nicky Katt) packs a Smith & Wesson Model 19 with Pachmayr rubber grips. Manute (Michael Clarke Duncan) himself appears to use the same revolver in the alley before being shot several times. He then flees from the alley and is stopped by Miho (Devon Aoki), where he is seen using two Model 19s before she cuts him in half with a large blade spear type weapon.
The Painted Cop (Ryan Rutledge) brings a squad armed, like himself, with Micro Uzis to take out Marv (Mickey Rourke) at the Roark's farm. We later see both an Old Town prostitute and an IRA mercenary with Micro Uzis.
Murphy, the IRA mercenary that shoots McCarthy (Clive Owen) from the T-Rex uses a Steyr AUG. Later when they find the bullet in Rafferty's badge, the bullet is far too large to be a 5.56mm.
A Mk 2 hand grenade (likely just a plastic molded prop) is used by Brian (Tommy Flanagan) to send Dwight flying into the tar pits and to send Miho airborne, but not kill her.
