The following weapons were used in the film Whiteout:
Deputy US Marshal Carrie Stetko (Kate Beckinsale) uses a Glock 26 throughout the movie, usually keeping it in a safe. Oddly when she initially removes it from the safe, it's a Glock 19. She later loses it when it's kicked away by the killer. Due to the weather, and the fact she was under attack, it was unrecoverable. She also uses it during the flashback sequences.
It may be noteworthy, that due to her injury, while she appears to have an adequate grip, she doesn't properly compensate for her left eye dominance, which leads to an unstable stance.
The 9mm South African clone of the Sa.23 Czechoslovakian submachine gun is used by one of the Russian guards during the opening scenes of the film. It is identifiable by the straight magazine, different foregrip (closer to the barrel) and the different style synthetic stock. The Czech versions have different furniture. The one in the film was converted to full auto fire, since the original Sanna-77 was sold semiauto only.
A Makarov PM is used by the bald guard in the opening scene.
A Tokarev TT-33 is used by Russian guards during the opening scenes.