FBI Special Agent Richard Messner (Ryan Reynolds) carries the Heckler & Koch USP as his duty sidearm throughout the film, somewhat atypical for these federal agents. FBI Special Agent Donald Carruthers (Ray Liotta) and the other FBI Agents also carry the Heckler & Koch USP as their sidearm. The USP is a .45 cal since the .45 auto engraving on the USP's slide is visible when Messner chambers the USP in a car. After Sharice Watters fires her sniper rifle at the FBI, Messner throws his USP at the window after depleting the magazine. He is seen unloading the magazine at the end of the film. In the so-called "Cowboy" ending, Messner uses the USP to do a double tap on two targets.
Beretta 92FS
The Beretta 92FS can be seen in the hands of several of Israel's security team out in the hall as they escort Sir Ivy away and when they get into a fight with the Tremor brothers. Sir Ivy (Common) picks up one of the pistols while in custody and uses it to fire at the Tremor brothers.
Beretta 21 Bobcat
Acosta (Nestor Carbonell) keeps a Beretta 21 Bobcat on an arm sleeve that he uses when his cover was blown. Note the tip up barrel configuration and how the slide ends to accommodate it.
M1911A1
Hollis Elmore (Martin Henderson) borrows an M1911A1 customized with a Caspian Recon slide from an old woman's house after she was taking care of him after being shot and thrown in the lake. He then uses it to shoot and kill Darwin Tremor out of revenge.
Glock 17 (Full Auto)
Lestor Tremor briefly fires his Glock 17 on full auto to take out a security guard who was on fire. Lestor can also be briefly seen firing the full auto pistol up in the air during the Tremor's introduction.
Glock 19
Georgia Sykes (Alicia Keys) can be seen with the Glock 19 as she enters the elevator and fires it at the FBI agents.
SIG-Sauer P220
The SIG-Sauer P220 can be seen in the hands of several of Israel's security team out in the hall as they escort Sir Ivy away and when they get into a fight with the Tremor brothers.
SIG-Sauer P232
A SIG-Sauer P232 is seen in an airport luggage carousel.
Sphinx AT 2000
Lazlo Soot (Tommy Flanagan) carries the Sphinx AT 2000 in a two-tone finish and fitted with a silencer in the last half of the film and uses it to execute Israel's bodyguards.
Jericho 941
Georgia Sykes (Alicia Keys) can be seen concealing a two-tone Jericho 941 as she prepares to head over to Israel's place of residence.
Revolvers
Smith & Wesson Model 500
Sir Ivy (Common) carries this 4" Barreled Smith & Wesson Model 500 revolver as his sidearm and pulls it on Israel when he finds out he was going to sell him out. Israel throws a card into Ivy's eye then Ivy fires off a cylinder from the revolver through the walls before running empty and being apprehended by Israel's security detail.
Smith & Wesson Model 642
Pasqual Acosta (Nestor Carbonell) uses the Smith & Wesson Model 642 to wound Georgia in the arm. Georgia Sykes (Alicia Keys) can be seen concealing this pistol as she prepares to head up to Israel's penthouse.
As Acosta prepares to fire his S&W 640 again, Carruthers uses his backup Smith & Wesson Model 340.
Colt Official Police
Used by an FBI agent to shoot Freeman Heller in the 1940s.
Heavy Weapons
Barrett M82A1
The main weapon Sharice Watters (Taraji P. Henson) uses is the semi-automatic Barrett M82A1 .50 BMG rifle. She uses it to shoot between buildings to cover Georgia by taking out several FBI agents. It should be noted that the FBI agents are unrealistically sent flying through the air when shot by it.
Assault Rifles
M4A1 Carbine
One of Israel's men (played by the film's director Joe Carnahan) was seen holding a M4A1 carbine during a robbery.
Submachine Guns
Skorpion SA Vz 61
Lazlo Soot (Tommy Flanagan) performs a hit with a pair of custom two-tone Skorpion SA Vz 61s in one of the opening scenes when they were describing Soot's style of assassination.