MK 101 cannon
The MK 101 is the designation of a 30 mm autocannon used in German combat aircraft during World War II. Although accurate and powerful, with a high muzzle velocity, it was very heavy, with a low rate of fire, which limited its production. == Development and use == Developed in 1935 by Rheinmetall-Borsig as a commercial venture as the MG-101 (later designated MK 101, with the "MK" abbreviating the term Maschinenkanone, as an autocannon), the MK 101 cannon was a 30 mm (1.18 in), long-barreled automatic cannon capable of firing nine different types of 30x184B mm ammunition (ranging from basic high explosive to tungsten-cored armor-piercing rounds).