There were estimated to be 400,000 German troops in Norway, at the time of the surrender in May 1945,..actually these troops saw very little fighting, after the invasion of Norway was over, British commandos made several raids..but they only lasted at the most few hours, or a day,..the British air force was very active, attacking German shipping, the battleship Tirpitz was sunk by 12.000 pound bomb, dropped in a raid by Lancaster bombers, though Germans faced Norwegian resistance fighter also
I would think that most of the small arms , K98 rifles, MP 40 smg, and mg 42 machine guns would be in very good shape,..they certainly wouldn't have taking a beating like small arms and men did in, Normandy, Russia, or the Ardennes