One of the numerous "cloche GFM" of the work Anzeling. GFM stands for Guetteur-Fusil Mitrailleur, or Observer Rifle-MG. The later is in fact a 7,5 mm light machine gun which could fire both semi-automatically as automatically. The observer had a periscope and several episcopes placed in the embrasures. He used the latter to look around while standing below the embrasures. The turret has been covered with barbed wire after the assault with paratroopers at the Belgian fort Eben-Emael.