German 2cm FlaK Solothurn anti-aircraft ammunition as cross sections. All of the following German 2cm ammunition was used in wo2 in the German 2cm FlaK anti-aircraft gun. The 20×138B cartridges were developed by the factory Solothurn. For all models shown below the brass or steel shellcasings have stamped powderbags. Descriptions of the shown cartridges below. All …