This small blockhouse covered the artillery casemate of Frenois near Sedan. Its armament consisted of one 7,5 mm light machine gun, one 8 mm heavy machine gun and an AT gun. This blockhouse could take both a 25 mm and a 37 mm gun. Unfortunately the later gun was designed to be used against the trenches of WW I. It was totally ineffective against the tanks the Germans used to cross the river Meuse near Sedan.