OB 2cm Flak is a former anti-aircraft bunker located in northern Norway, near the coast of Nordland county. Built during the Cold War, it was part of Norway's extensive coastal defense network designed to protect against potential Soviet air threats. The bunker housed a 2cm anti-aircraft gun, a common caliber for rapid-fire flak systems of the era.
Norway's strategic position bordering the Soviet Union made such installations critical for national defense during the heightened tensions of the Cold War period.