Several M1911 handguns are seen throughout the movie.
Custom M1911
In "Field Test", Maroni carries a custom M1911. The slide has a unique scale-like texture for the slide serrations, and is wider along the rails similar to the SIG-Sauer GSR.
SIG P232
Stechkin APS
In "Field Test", "The Russian" is seen using a Stechkin APS.
Makarov PM
In "Field Test", a Russian gangster who gets shot carries a Makarov PM.
Smith & Wesson Model 686
In "Working Through Pain", one of the weapons that Batman finds in the sewer is a Smith & Wesson Model 686.
Unidentified Revolver
The mugger who kills Bruce Wayne's parents is seen using an unidentified 5-shot revolver.
Walther P99
In "Working Through Pain", one of the guns that Batman finds is a Walther P99.
Walther P38
One of the guns that Batman finds in "Working Through Pain" is a Walther P38.
MP-446 Viking
Most of the Russian mobsters in "Field Test" use MP-446 Viking pistols.
Glock
Several Glock pistols are seen throughout the movie. While most appear to be full-sized variants, none of them are shown clearly enough to determine the exact model and caliber.
Fox's Handgun
In "Field Test", Lucius Fox demonstrates the mechanics of a "force field" device that he has developed by shooting at it with an unidentified handgun.
Submachine Guns
MP5A5
Several Gotham P.D. officers are seen with Heckler & Koch MP5A5 submachine guns.
Thompson M1928
Maroni's men in "Crossfire" use Thompson M1928 submachine guns.
PPSh-41
The Russian mobsters in "Crossfire" carry PPSh-41s.
MAC-11
In "Crossfire", Maroni is seen dual-wielding MAC-11. Another MAC-11 is seen in "Deadshot" in the bag of guns that Bruce brings back to Wayne Manor.
Deadshot's Wristgun
Deadshot is seen using a wrist-mounted weapons system that consists of two medium-caliber submachine guns.
Rifles
Deadshot's Rifle
In "Deadshot", the title character uses a custom-built sniper rifle. He is shown carrying it disassembled in a foam-lined case.
AK-47
In a flashback during "Working Through Pain", a soldier is seen with a generic AK-47.
Other Weapons
RPG-7
In "Crossfire", "The Russian" breaks out a RPG-7 during the firefight with Maroni's men.