Léon's (Jean Reno) signature pistols are Beretta 92FS's with compensators and in some scenes sound suppressors. A compensator reduces rising of the barrel during rapid fire by redirecting propellant gases. We briefly see Mathilda (Natalie Portman) assembling Léon's (Jean Reno) Beretta 92FS pistols although we never see her take a shot. The combination of a suppressor and compensator can be considered nonsensical because a suppressor is supposed to avoid the gases to escape from a shot and a compensator lets gases out which contradicts the function of a suppressor, but the threads of the suppressor clearly affix past the compensator cuts, canceling the function of the compensator. During the end shootout, one of Léon's Berettas features a two-toned finish, with a stainless frame.
The Fatman (Frank Senger) arms himself with a pair of IMI Mini Uzis after emptying his IMI Micro Uzi. He is held at knife point by Léon (Jean Reno) before he can use them. ESU members at the end of the film are also seen armed with them.
Norman Stansfield (Gary Oldman) uses an Ithaca 37 with a tactical flashlight mounted on the pump forend, and fitted with a pistol grip while raiding Matilda's (Natalie Portman) house. Malky (Peter Appel) also uses an Ithaca 37 with an extended magazine tube.
A tutone Smith & Wesson automatic pistol is seen in the hands of one of Stansfield's men. It appears to be a stainless Smith & Wesson 3913 frame with a blued Smith & Wesson 3914 slide.
During the attack on Mathilda's (Natalie Portman) family's apartment one of Stansfield's (Gary Oldman) men Willi Blood (Willi One Blood) is armed with an Kimel AP-9 pistol fitted with a 20-round magazine which he uses to kill Mathilda's little brother.
Mathilda's father (Michael Badalucco) pulls a Remington 870 Slug Gun shotgun on Stansfield (Gary Oldman) and shoots him in the shoulder during the attack on his apartment, as well as killing another henchmen with a shot to the back. Despite being a slug gun, people are impacted by buckshot when shot by it. We also see a Remington 870 on the gun rack in the Fatman's house, and an ESU member is seen wielding one during the final shootout.
A SIG-Sauer P226 is used by one of Stansfield's DEA agents Benny (Keith A. Glascoe) as his duty weapon. It has some sort of laser aiming module mounted under the barrel.
The actor who played Benny, Keith A. Glascoe, was also a real life NYC Firefighter. He died rescuing people from the South Tower of the World Trade Center on September 11th, 2001.
A suppressed Skorpion SA Vz 82 is wielded by one of Stansfield's DEA Agents (Don Creech) after Mathilda's family is killed. It can be noted as the .380 ACP model Vz 82 by its straight magazine, unlike the curved magazine of the .32 ACP Skorpion SA Vz 61.
Léon (Jean Reno) has a Ruger SP101 in his case among his collection of weapons. He gives it to Matilda (Natalie Portman) when telling her to leave and be a "cleaner" on her own, resulting in her walking to the window and emptying the gun (although she fires six shots when the revolver only holds five). Later in the film Matilda tries to see if Léon really cares about her, so she loads three chambers, leave two empty, and plays the very difficult version of Russian Roulette. Léon tells her he could hear that there was a bullet in the chamber (not likely), but she continues and nearly kills herself before he knocks the gun away.
Stansfield's Smith & Wesson model 629 appears to be customized or at least a rare, non-catalogued special production run. The standard and/or limited production, short barreled 629s usually have slightly shorter ejector rods (check out the first picture in this particular sequence). This gun here has the standard length ejector rod. The muzzle (check out the previous picture) is nicely crowned, too. It's done in a manner uncommon on factory-standard Smith & Wesson revolvers (and limited production runs). If pressed to the wall, I would say, Stansfield's handgun is a customized & shortened Smith & Wesson model 629 "Classic Hunter". Unlike the standard model 629, the "Classic Hunter" variation was a special production run made in limited quantities in the late 1980's/early 1990's. It could be had in carbon blue steel and in stainless-steel, came with an unfluted cylinder (standard production 629s feature fluted cylinders) and had either in 6-inch and 8 3/8-inch barrel length with the full underlug. Since the 629 "Classic Hunter" Stansfield packs ain't in factory configuration anymore, I suppose it has been further customized and shortened, perhaps to make it more concealable and lighter to carry all-day (It's still a hefty, VERY noticeable and mean-looking revolver!).
Spectre M4
A Spectre M4 is seen in Leon's case but not used or even handled by Leon -- but it is used by the drug dealer in the Ring Trick scene of the Special Edition.
Leon had requested a rifle from Tony (Danny Aiello) to train Mathilda on her long range sniping exercise. Tony had one of his workers go into the freezer and pull out this beauty!
Mathilda (Natalie Portman) uses a simunition firing rifle in her practice hit on the jogging politician in the park. Simunition is a trademark for training ammunition produced by General Dynamics - Ordnance and Tactical Systems Canada Inc. of Québec, Canada. Simunition encompasses many types of training rounds, the best-known being the FX Marking Cartridge, or paintball round.
Simunition rounds are designed to be fired through police and military service weapons. Most Simunition cartridges require slight modification to the weapon to ensure that normal service rounds cannot be fired during training and to simulate full recoil with reduced-pressure/reduced-velocity rounds for more realistic training. The prop itself is a heavily modified AR-15 and it's very unlikely it actually fired the simunition. Simunition is used only for CQB training, as there is no way any paint round could reach the velocity to hit a target at that distance.
The rifle is an old model SGW Multimatch before SGW turned into what is now known as Olympic Arms. With a 16" medium heavy weight barrel, shaved gas block, carbine length free floating aluminum handguard tube, and a Bell & Carlson AR15 Thumbhole stock. It has blued 20 round magazines (the kind available in the early 1990s), a Harris Bipod, and a dummy short 'suppressor' for the end of the threaded barrel. The scope is a Burris with a 40mm obj, and sits on Weaver's tall see-through rings.
The Armi-Jager AP-15 is seen in the hands of a few ESU officers after the big fight. This could presumably be the same fake grenade launcher in Besson's Nikita.
