In Oslo, the two M/16s were mounted in a battery at Gressholmen - a small island in the harbour - and were ideally placed to take part in the battle for Fornebu. Norwegian sources claim this battery shot down one or two German bombers, despite the fact that the crew was untrained (17 out of the 44 men had been in uniform for only six days) and several became shell-shocked or deserted their posts. In addition to this and other problems, one of the guns jammed early-on in the engagement.