List of autocannon

Columns: Caliber ( mm ) | Power source | Weapon name | Country of origin | Period
20 | Internal | M39 cannon | United States | Cold War | 20 | Internal | Mauser MG 213 | Nazi Germany | World War II | 20 | Internal | ShVAK cannon | Soviet Union | World War II | 23 | Internal | Rikhter R-23 | Soviet Union | Cold War | 27 | Mauser BK-27 | Germany | Cold War | 30 | External | Rheinmetall RMK30 | Germany | Modern | 30 | Internal | ADEN cannon | United Kingdom | Cold War | 30 | Internal | DEFA cannon | France | Cold War | 30 | External | GIAT 30 | France | Cold War | 35 | Internal | Oerlikon Millennium 35 mm Naval Revolver Gun System | Switzerland | Modern

Example questions:
What is the name of the revolver cannon whose country of origin is the common English name for Germany between 1933 and 1945 ? | What is the country of origin of the revolver cannon that fires caseless 30 × 250 mm ammunition cartridges ? | What is the name of the revolver cannon whose country of origin is the world 's largest economy by nominal GDP ? | What is the country of origin of the revolver cannon that took some time to develop , and was not used operationally until 1964 ?

Answers:
Mauser MG 213 | Nazi Germany | M39 cannon | Soviet Union