Please PM additions or corrections to tyme at either TheFiringLine.com or TheHighRoad.org.
There is a newly-created wiki at IMFdb.org that aims to catalog firearms used in movies (and maybe TV too, I'm not sure). Since the wiki structure is much more suited to this task, I urge everyone to contribute there. Perhaps also pick an entry or two from this list and add it to that wiki.
Aliens
The M41A Pulse Rifle is a combination of an M1 Thompson, a SPAS-12, and a Remington 870.
Pvt. Frost and Vasquez: HK VP70
Anaconda
Spyderco Delica
Armed and Dangerous
John Candy: either a FA/NAA .454 Casull or a modifed Blackhawk revolver
The Avengers
Thurman (or an attacker?): Spyderco Police
Big Trouble in Little China
Jack Burton: Tec-9
Black Dog
Spyderco Delica
Black Hawk Down
Shughart and Gordon: M1A, suppressed M4, 1911
Durant: MP5
Blade Runner
Ford's weapon is a combination of a Steyr Mannlicher .222 Model SL rifle and a Charter Arms .44 Special Police Bulldog.
Boondock Saints
Two Russian goons: Desert Eagle .50AE
Most characters have a Beretta 92
Bourne Identity
Treadstone sniper: Sig 550
Bourne: SigPro 2009
Bourne Supremacy
Kirill: Remington 700?; Walther P99 AS Titanium (only available pre-2004)
Bourne: something based roughly on a Walther WA2000
Broken Arrow
Deakins: Beretta 93R, M14 (somewhere it was claimed to be an AK with no stock)
Hale: Sig p220 or p226, AR-15
SEAL computer nerd: Sig p228?
Terry's revolver: S&W 66
Other bad guys: Uzi, HK MP5
Bulletproof Monk
Monk: Desert Eagle (2)
Casino Royale
Bond (beginning): Browning Hi-power and Walther P99
first bomb-maker: USP compact
Bent Section Chief: Star Ultrastar
Bond killing Mr. White: HK UMP 9mm
Clear and Present Danger
Chavez: M40A1
John Clark: Oly OA-96 or something similar, a Glock when he kidnaps Ryan
The Client
Barry the Blade: SE Spyderco Police
Cliffhanger
friend of Stallone's character: SE FRN Spyderco Endura (1st-gen)
Collateral
Vincent: HK USP45; silenced Ruger MK2
Vincent: S&W 659, taken from the desk guard he killed at the federal building
Vincent: Safariland CD-Auto mag carriers, possibly a blade-tech IWB holster
Vincent: Chris Reeve Sebenza (large)
Vincent: Silhouette 8586 sunglasses
Bodyguards at Fever: Steyr SPP, various others
Felix's head foot soldier: 1911; HK G36c
Felix's foot soldier: Glock ?
Con Air
Lockbox/Cyrus: Sig ?
DEA agent: Kel-Tec ?
Copycat
Ruben: Beretta 92
Monahan: 1911 at the range, Sig p232 otherwise
Crimson Tide
Capt. Ramsey: Colt Model 1911 U.S. Army-marked .45 ACP pistol, serial #357414
The Da Vinci Code
Silas: HK USP 9mm
One of the police: Sigpro
monk: maybe a CRKT Point-Guard
The Day After Tomorrow
guy who falls through glass and cuts safety rope: CRKT M16-14
Daylight
Spyderco Endura FRN (first-gen w/plastic clip)
Demolition Man
Snipes: S&W 3913, serial #9951
Stallone: Beretta 92F #BER016436Z
The Departed
Sullivan: Kershaw Whirlwind
Costigan: Walther PPK
Devil's Advocate
Kevin Lomax's suicide gun: some stainless subcompact (PPK? p232?)
Die Hard
John McClane: Beretta 92F
Hans killing Takagi: allegedly an HK P7M13
Most of the crew: HK MP5
Karl: Steyr AUG
Die Hard 2
"Glock 7" (in reality there is no Glock 7)
Bad guys: MP5 mostly
Die Hard with a Vengeance
Katya kills Targo: PPK? w/ pearl grips
Dirty Harry
By reputation, Dirty Harry used a Model 29 .44mag
The gun used in the movie was a S&Wesson Model 25 in .45 Colt, because it was easier to load blanks for.
Donnie Darko
Donnie Darko: (Colt?) 1911 A1
The Edge
Hopkins: Bryan Lyttle custom knife
Enemy at the Gates
Most of the Russian snipers: Mosin Nagant 1891/30
Vasili (at age 5): Mosin Nagant 1891 with 3.5 PU scope (incorrect optics and mount for the time period)
Vasili (later in the movie): Mosin Nagant 1891/30
Enemy of the State
Fake Brill: Sig ?
Brill: Colt 1911 (marked U.S. Army), serial #357414
Robert Dean steals a full-sized Glock from one of the EMTs in the ambulance.
Entrapment
Spyderco Delica
Equilibrium
First rebel group leader: Remington 870 Express, Pachmayr Vindicator grip, Aimpoint
Everyone: top-ejecting full-auto Beretta 92s with longer barrel and compensator
Archer: Sig p226? 228? (it is a Sig, [http://www.gunsinmovies.com/movies/faceoff.html not a USP])
Castor/Jamie: cheap kris-bladed balisong
Castor: Cold Steel Safe Maker I
The Getaway
McQueen: Colt Govt #C183847, Star 9mm when firing, 12-gauge pump Hi Standard Model K1200
The Getaway (remake)
unknown: Benelli M3
Ghosts of Mars
unknown: HK G36K
Grosse Point Blank
Martin: Glocks
Hannibal
Clarice Starling: Glock 22?
Clarice Starling: Benchmade Stryker? or CRKT Crawford/Kasper?
Hannibal Lecter: Spyderco Harpy
Heat
Neal's crew (armored car heist): M16A1, Michael with a FN FAL and a Ruger P-90, Trejo with an AK-47
Waingro: Star Megastar*
Neal McCauley's gun: HK USP (the distinctive USP safety is clearly visible when he puts his gun on the table of his house) until the depository scare, then a Sig p220*
Various people allege that Chris has a USP Compact that can be seen when he wakes up at Neil's. I haven't found a frame where it's clear enough to judge.
Vincent - Colt Officers' ACP*
Van Zant's assassin (drive-in): Steyr TMP*
Chris at (drive-in): HK 91*
Michael (drive-in): Benelli M3 Super 90
Neil's crew (bank robbery): M733A w/ 11.5" bbls, except Michael who uses a Galil ARM*
Vincent (bank robbery): FN FNC Para
Casals (bank robbery): AR15 A2
Drucker (bank robbery): Mossberg 500
Chris: perhaps a Benchmade (auto?) (when he cuts the plastic around some of the money in the bank vault)
from a contributor: Chris Reeve was contracted to make a knife for Vincent to use, but when he heard it might be shown in conjunction with illegal activity dropped the project.
The Hostage
Willis as negotiator: Kimber TLE 1911, Glock 27 with rubber bands on the grip
Willis as beat cop: full-sized Glock, shotgun - Remington 870?
Bad guys: M4, MP5, FN P90, USP Expert
The Hunted
Tom Brown Tracker
The Jackal
Jackal's gun: unknown, might be a fake gun not based on anything real, to avoid stigmatizing a particular gun that might be used in those circumstances.
Sniper Rifle: HK PSG-1
Jennifer Eight
attacker: Spyderco Police
John Q
John Q: Beretta 92F*
Kill Bill Vol. 1
Uma Thurman: SOG Desert Dagger (S25)*
Buck: Buck 112 Ranger*
Bill: Colt Single Action Army "Peacemaker" .45 caliber
Kill Bill Vol. 2
Beatrix: Hi-Power, chromed or nickel plated (the gun she carries into Bill's house)
Bill: Colt Single Action Army "Peacemaker" .45 caliber
Kiss the Girls
a bad guy: SOG Pentagon
Kiss Kiss Bang Bang
Gay Perry: had a Vektor/Vector CP-1 (warning) that got thrown into the lake
L.A. Confidential
Bud: Ithaca 37
La Femme Nikita
Nikita (restaurant): Desert Eagle
Nikita (second job): Steyr AUG
League of Extraordinary Gentlemen
Capt. Nemo: various Tokarev T33s
Nemo's crew: Sten MKII smgs, modified to look "Indian"
Connery: Uberti 1873 (Winchester 1873 copy) w/ engraving by Shaun A. Banks and original U.S. silver dollar in the stock, serials #52388 & #52370
Bad guys: AK and Thompson M 1928 in metal box exteriors
Leon (The Professional)
Leon: Beretta 92F with compensator
Lethal Weapon 2,3,4
Mel Gibson: Beretta 92F
Glover: S&W model 19-6 #BBJ6332, S&W 5906 #TCE3933
Man on Fire
Creasey: Glock 34; 1911 later on
Manchurian Candidate
Frank Sinatra: P38 #9335c
Manhunter
Jim Zubiena (SWPL champ in '84 and '88) appears at around 51:00; also in Miami Vice (TV)
Neo-Nazis: Barrett M82 and various other small arms (first shooting)
Other bad guys: S&W autos, H&K 94, H&K MP-7 under someone's jacket
An Adam Air A500 makes an appearance as "flight 000."
The ferrari is an F430 Spider.
Miller's Crossing
Lots of people: Thompson Machine Guns
Tom "executing" Bernie: Astra 400 9mm "Largo"
Dane: Some evil-looking revolver
Mission Impossible
Prague team: Sig 228/229, Beretta 92F
Computer Room Knife: allegedly a CGI artifact. regardless, the handle looks rectangular, not ergonomic enough for real use. (http://www.bladeforums.com/forums/showthread.php?t=443797)
Mission Impossible 2
Hunt: Beretta 92F and 92F centurion (shoulder rig, 7 o'clock IWB grip-up holster for the centurion)
Ambrose: Sphinx 9mm (similar to a CZ 75)
An HK USPc appears out of nowhere in the final fight scene. Hunt has two Berettas. Ambrose has a Sphinx and nowhere to keep a second firearm. Where did he have it, in his sock? What idiot uses a Sphinx over a USPc?
Ambrose's boot knife: Kershaw 1006L*
Hugh: Sig p230/232 and a Vektor/Vector CP-1 (warning)
Mission Impossible 3
Davian: Sig p228 sport
Mr. and Mrs. Smith
What gun does John Smith have in Colombia? The grip is visible...
John, getting arms from his shed's basement: HK P7M8?
Jane, the gun she gets from the oven: HK P7M8 (or P7M10?)
John, after the wine incident: Sig p229
John, in the van: HK USP Elite .45
John and Jane, final shootout: Glocks, MP5A2, MP5K*
Murder at 1600
Detective Harlan Regis: Glock 17
Neil: some subcompact (maybe a Glock 26/27, maybe a PPK or Sig)
General Clark Tully: M4
Various Sigs carried by SS agents and Tully's compatriots
National Treasure
Cage: Gerber AR 3.25 fine edge
Natural Born Killers
Jack Scagnetti: Desert Eagle (Mark VII .44Mag or .357mag?)
Jules: Star Model B 9mm, chromed with pearl grips, serial #B257963. Someone somewhere suggested that later in the movie it's a Star Megastar, but that's doubtful.
Vincent: Auto Ordnance 1911A1, chromed with pearl grips, serial #AOC10681
Willis: kills Vincent with a MAC-10
Punisher
Emerson Karambit (satin)
Spyderco Civilian (g10)
Quigley Down Under
Sharpes 45-110
Chuck Stapel custom knife w/ stag handle
Red Dawn
Maadi AKMs
Finnish M78 Valmets
Replacement Killers
in mind that since Trejo is an ex-felon, all the guns he uses may not even be blank guns, they may be completely deactivated, or rubber/plastic look-alikes, with muzzle flash added in post-production)
Nightclub: Beretta 92
Failed assassination of cop's kid: 9mm AR-15 conversion
Meg Coburn's desk gun: Browning Hi-Power
Gun John Lee steals from guy with shotgun: HK USP
Kogan at carwash: Desert Eagle (.357mag or .44mag?). Also some sort of HK G3-type rifle.
Kogan's pals at carwash: Beretta, MP5KPDW, at least two shorty 9mm ar-15s.
John at carwash: HK USP, also uses guns he gets from dead guys: a revolver, a shorty 9mm ar-15, and the MP5KPDW. Gives Meg the USP in the car.
Replacements: Til has the briefcase MP5 at the arcade, disgards the briefcase, and the gun morphs to an A3 or MP5N variant.
Replacements: Trejo has a Beretta PM-12s at the arcade.
Replacements at the theater: Trejo has an FN FAL, Til has something from the HK G3 family.
John again: he's back to the Beretta, breaking glass ashtrays
Loco: has a Kahr K9 Meg steals. His truck has a bunch of Berettas.
One of Loco's pals points something like a hi-power at Meg.
Cartoon Festival: the assassin who takes the bullet has some HK rifle, the other one looks like an ar-15.
Costner: 1911, but at the beginning a Star Model B 9mm serial #366356
Connery's double-barrelled shotgun: custom, based on a double-barrel 12-gauge "Overland" shotgun
Usual Suspects
Lots of people: Browning Hi-Power
McManus sniping: Steyr AUG
McManus and Hockney on the boat: HK MP5N
Virtuosity
Denzel: Sig p228 with a compensator/laser attachment and three buttons in the grip.
Denzel: Gets a HK USP from one of the dead guards after Sid sets him free.
The Way of the Gun
Parker and Longbaugh: 1911
Longbaugh: scoped 7.62mm Galil ARM
Parker: Remington 870
Jeffers and Obecks: HK USP
Doctor: Walther PPK
The Wild Bunch
Final scene: Rock Island Arsenal 1917A1 BMG #693798
Windtalkers
KaBar Marine knife
Wrong Turn
female climber, beginning: Kershaw Boa
The Vector/Vektor CP-1 was recalled in 2000 due to a defective (or non-existent) drop safety. That means the gun may fire even if the trigger isn't pulled.