# List of autocannon

Autocannons are automatic guns with calibers of 20 millimeters (0.79 in) to 60 millimeters (2.4 in). There are many types, including chain guns, gast guns, revolver cannons, and rotary cannons. They are being used as military aircraft main guns, naval guns, anti-aircraft weapons, infantry fighting vehicle main guns and are occasionally found on reconnaissance vehicles like the LAV-25.

## General autocannons

| Caliber (mm) | Power source | Weapon name | Country of origin | Period |
| 20 | Internal | Becker Type M2 20 mm cannon | German Empire | World War I |
| 20 | Internal | Nkm wz.38 FK | Poland | Interwar |
| 20 | Internal | Polsten | Poland | World War II |
| 20 | Internal | Berezin B-20 | Soviet Union | World War II |
| 20 | Internal | ShVAK cannon | Soviet Union | World War II |
| 20 | Internal | Ho-1 cannon | Empire of Japan | World War II |
| 20 | Internal | Ho-3 cannon | Empire of Japan | World War II |
| 20 | Internal | Ho-5 cannon | Empire of Japan | World War II |
| 20 | Internal | Type 99 cannon | Empire of Japan | World War II |
| 20 | Internal | Automatkanon m/40 | Sweden | World War II |
| 20 | Internal | Automatkanon m/45 | Sweden | World War II |
| 20 | Internal | Automatkanon m/49 | Sweden | Cold War |
| 20 | Internal | Hispano-Suiza HS.404 | France | World War II |
| 20 | Internal | M621 cannon | France | Cold War |
| 20 | Internal | Oerlikon S | Switzerland | World War II |
| 20 | Internal | Oerlikon FF | Switzerland | World War II |
| 20 | Internal | Oerlikon KAE | Switzerland | Modern |
| 20 | Internal | MG FF cannon | Nazi Germany | World War II |
| 20 | Internal | MG 151/20 | Nazi Germany | World War II |
| 20 | Internal | Rheinmetall MK 20 Rh 202 | Germany | Cold War |
| 20 | Internal | Colt Mk 12 cannon | United States | Cold War |
| 23 | Internal | Afanasev Makarov AM-23 | Soviet Union | Cold War |
| 23 | Internal | Gryazev-Shipunov GSh-23 | Soviet Union | Cold War |
| 23 | Internal | Nudelman-Rikhter NR-23 | Soviet Union | Cold War |
| 23 | Internal | Nudelman-Suranov NS-23 | Soviet Union | World War II |
| 25 | Internal | 72-K | Soviet Union | World War II |
| 25 | Internal | Automatkanon M/32 | Sweden | World War II |
| 25 | Internal | Hotchkiss 25 mm cannon | France | World War II |
| 25 | Internal | Type 96 cannon | Empire of Japan | World War II |
| 25 | External | M242 Bushmaster | United States | Cold War |
| 25 | Internal | Oerlikon KBA | Switzerland | Cold War |
| 28 | Internal | 1.1" autocannon | United States | World War II |
| 30 | Internal | 30 mm Shipunov 2A42 | Soviet Union | Cold War |
| 30 | Internal | 30 mm Shipunov 2A72 | Soviet Union | Cold War |
| 30 | Internal | Gryazev-Shipunov GSh-30-1 | Soviet Union | Cold War |
| 30 | Internal | Gryazev-Shipunov GSh-30-2 | Soviet Union | Cold War |
| 30 | Internal | Ho-155 cannon | Empire of Japan | World War II |
| 30 | Internal | Type 2 cannon | Empire of Japan | World War II |
| 30 | Internal | Type 5 cannon | Empire of Japan | World War II |
| 30 | Internal | MK 101 cannon | Nazi Germany | World War II |
| 30 | Internal | MK 103 cannon | Nazi Germany | World War II |
| 30 | Internal | MK 108 cannon | Nazi Germany | World War II |
| 30 | Internal | Nudelman-Rikhter NR-30 | Soviet Union | Cold War |
| 30 | Internal | RARDEN | United Kingdom | Cold War |
| 30 | External | M230 Chain Gun | United States | Cold War |
| 30 | External | Mk44 Bushmaster II | United States | Cold War |
| 35 | Internal | Oerlikon KDA | Switzerland | Cold War |
| 35 | External | Bushmaster III | United States | Cold War |
| 37 | Internal | BK 37 | Nazi Germany | World War II |
| 37 | Internal | COW 37 mm gun | United Kingdom | World War II |
| 37 | Internal | Ho-203 cannon | Empire of Japan | World War II |
| 37 | Internal | Ho-204 cannon | Empire of Japan | World War II |
| 37 | Internal | M4 cannon | United States | World War II |
| 37 | Internal | Nudelman N-37 | Soviet Union | Cold War |
| 37 | Internal | Nudelman-Suranov NS-37 | Soviet Union | World War II |
| 37 | Internal | QF 1-pounder pom-pom | United Kingdom | World War I |
| 40 | Internal | Bofors 40 mm gun L/60 | Sweden | World War II |
| 40 | Internal | Bofors 40 mm gun L/70 | Sweden | Cold War |
| 40 | Internal | Ho-301 cannon | Empire of Japan | World War II |
| 40 | Internal | QF 2-pounder pom-pom | United Kingdom | World War I |
| 40 | Internal | Vickers S gun | United Kingdom | World War II |
| 40 | Internal | Otobreda Fast Forty | Italy | Cold War |
| 40 | External | Bushmaster IV | United States | Cold War |
| 40 | Internal | 40CT cannon | United Kingdom | Modern |
| 45 | Internal | Nudelman-Suranov NS-45 | Soviet Union | World War II |
| 50 | Internal | Rheinmetall BK-5 | Nazi Germany | World War II |
| 57 | Internal | Ho-401 cannon | Empire of Japan | World War II |
| 57 | Internal | AZP S-60 | Soviet Union | Cold War |
| 57 | Internal | ZIF-31 | Soviet Union | Cold War |
| 57 | Internal | Automatkanon m/47 | Sweden | Cold War |
| 57 | Internal | 57 mm Bofors L/60 | Sweden | Cold War |
| 57 | Internal | 57 mm Bofors L/70 | Sweden | Cold War |
| 60 | Internal | 60mm HVMS | Israel/ Italy | Cold War |

## Revolver cannons

| 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 |
| 23 | Internal | Rikhter R-23 | Soviet Union | Cold War |
| 27 | Internal | 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 |
| 30 | Internal | Oerlikon KCA | Switzerland | Cold War |
| 30 | Internal | NN-30 | Soviet Union | Cold War |
| 35 | Internal | Oerlikon Millennium 35 mm Naval Revolver Gun System | Switzerland | Modern |
| 42 | External | Red King | United Kingdom | Cold War |

## Rotary cannons

| Caliber (mm) | Power source | Weapon name | Country of origin | Period |
| 20 | External | M61 Vulcan | United States | Cold War |
| 20 | External | M197 electric cannon | United States | Cold War |
| 23 | Internal | Gryazev-Shipunov GSh-6-23 | Soviet Union | Cold War |
| 25 | External | GAU-12 Equalizer | United States | Cold War |
| 30 | External | GAU-8 Avenger | United States | Cold War |
| 30 | External | GAU-13 | United States | Cold War |
| 30 | Internal | Gryazev-Shipunov GSh-6-30 | Soviet Union | Cold War |
| 37 | External | T250 | United States | Cold War |
| 37 | External | Hotchkiss 1-pounder Rotary Cannon | France | 19th century |
| 47 | External | Hotchkiss 3-pounder Rotary Cannon | France | 19th century |