The six-turret 20P7 bunker was made from chrome molybdenum steel, had a thickness of around 30 cm and a weight of around 51 tonnes. It was designed to be used against infantry and lightly armored vehicles. Tower armament consisted of 2x MG34. 3 side-mounted angle telescopes and panoramic sight,which was located in the middle of the tower, were used for observation and target assignment. And MG-lafettes had also telescope for target shooting.