Members of the Norwegian Police Service stationed in Fortitude continue to carry the Glock 17 as their service firearm. Sheriff Eric Odegard (Björn Hlynur Haraldsson), Officer Petra Bergen (Alexandra Moen) and Officer Ingrid Witry (Mia Jexen) are seen carrying them throughout.
Note: Ordinary Norwegian police officers are usually not armed, but they have weapons in their patrol cars. The standard issue pistol for the Norwegian policemen is the Heckler & Koch P30, while the special unit has access to Glocks. It can be assumed the reason the officers permanently carry their guns is due to the laws in Fortitude stating all citizens must be armed (in case of polar bear attacks).
A Smith & Wesson Model 27 is seen in the possession of Lazlo Hindemith (Brian McCardie) and his associates during a binge on drugs and "Muskemaal", a narcotic drink.
Michael Lennox (Dennis Quaid) carries a Smith & Wesson Model 66 on his expedition to the Soviet weather station outside Vukobejina. It is later used by his son, Rune Lennox (Edvin Endre) and Yeka Podnikov (Eloise Smyth). Lennox refers to it as a "magnum", and that it is the only handgun "powerful enough to kill bears".
Officer, later Sheriff Eric Odegard (Björn Hlynur Haraldsson) is seen briefly handling a Remington 700 SPS (a modern variant of the Remington 700) during his search for the missing Dan Anderssen.
Ruger M77
One of the mine workers investigating an abandoned mine carries a Ruger M77.
Submachine Guns
PPSh-41
Soviet Union soldiers investigating an incident in Vukobejina in 1942 are seen armed with PPSh-41 submachine guns.
Assault Rifles
AK-74M
Russian FSB soldiers stationed in Vukobejina are seen armed with AK-74M assault rifles with what appear to be GP-25 under-barrel grenade launchers.
AKS-74U
The Russian soldier who attacks Michael Lennox (Dennis Quaid) in the abandoned weather station has a AKS-74U slung across her back.
Other
GP-25 Grenade Launcher
Russian FSB soldiers stationed in Vukobejina are seen with GP-25 under-barrel grenade launchers attached to their weapons.
Flamethrower
Russian hazmat soldiers are seen using a flamethrowers to destroy infected items in Vukobejina.
Flare Gun
Dan Anderssen (Richard Dormer) briefly uses a flare gun to threaten Dr. Sarinda Khatri and obtain her access pass to the Fortitude Arctic Research Centre (FARC).
Stun Gun
Vladek Klimov (Robert Sheehan) uses a handheld stun gun to incapacitate Dr. Sarinda Khatri.