Yes, one of the henchmen holds a AKS-74U style of weapon with a 5.45x39mm magazine (!) but it has an Underfolding stock. It was probably a 5.45mm underfolding AK that was chopped down by an armorer and had the Krinkov front end installed. There are lots of weird custom jobs in the movie gun world, and 'Frankenstein guns' appear from time to time.
M240B
Ruger Mini-14
Some of Taha's henchmen can be seen holding Ruger Mini 14 rifles in standard configuration.
Beretta M12
Unknown Shotgun
Unknown Revolvers
In the film there are quick flashes of nearly dozens of different types of handguns, most of them too quick (or blurry) to identify. Here are some revolvers which (at this time the makes/models escape me). IMFDB users will figure them out in time. :)
Jericho 941
Taha has a second pistol on his desk, which appears to be a Jericho 941 with a custom port cut into the slide.
AP9
Ruger MP9
Beretta M92
Beretta M93R Auto 9
Seen during the fight in the gambling den, one of Montoyas' men fires a full auto pistol that strongly resembles the pistol used by RoboCop and also used in Underworld: Evolution. Most likely a Beretta M93R with a custom extended front end, though this is an educated guess based on general shape and usage in other movies.
IMI Desert Eagle
Ruger KP94DC
Sig Sauer P220 Pistols
Tomaso grabs a pair of Sig Pistols during a fight. The full size and large aperture of the barrel would indicate a big caliber like a .45 acp, so the assumption is that they are P220s.
SIG P228 pistol
Since the SIG pistols are supposedly stolen from the French National police, they should be SIG Pro SP 2022 or 2009 pistols, but they are probably Sig P228 pistols since they don't have the integral rail of the 2022 or the 2009 pistols used by the French.
Both Gangster K2 (Tony D'Amario) and Heroine Lola (Dany Verissimo) use Heckler & Koch MK23 SOCOM Pistols (.45 acp).
Glock G32
Elite French Police Captain Damien Tomaso (Cyril Raffaelli) uses a Glock G32 - chambered for .357 sig. Since Glocks all look alike the only reference to this caliber is a French language article which mentions the actor using a 357 pistol. Since the character never touches a revolver or a Desert Eagle, and that this is a French movie with a French Armorer, I am assuming that his Glock is a Model 32.
Glock G33
Though Tomasos' pistol is supposed to be a compact G32 in some of the scenes he seems to be firing a subcompact Glock. Since he is using the same ammunition (in the movie) it should be the Subcompact Glock 33.
Taurus PT92
Used by the horrifying Carlos Montoya, who looks more like a character out of Sin City than a French underworld Boss, carries what looks to be a chrome plated PT92.