Special use for the Hege Manton made of beryllium. After opening the revision screw on the side, the old ignition hole insert is pushed out and replaced with the new one. If the new insert is correctly seated and the revision screw is screwed in again, the connection from the powder chamber to the chamber in the ignition hole insert is established. For this purpose, a 4.5mm drill centrally guided in the barrel is inserted from the muzzle into the connecting channel (4.5mm diameter) between the powder chamber and the ignition hole insert and the wall of the ignition hole insert is drilled out. A special drilling device with a depth stop and nylon bushings for central guidance in the barrel can an order of ignition hole inserts for 0.01 Euro 1 week.