Mk 11 mod 5 (20 mm)

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The Mk 11 mod 5 cannon is a 20 mm cannon fitted into the Mk 4 Mod 0 aicraft gun pod that could be fitted to the bomb rack. It was developed by the US navy and used in planes like the A-4, F-4 or OV-10. Its main use is for an air-to-ground attacks. It was extensively used during the Vietnam conflict.

Vehicles equipped with this weapon

General info

The 20 mm Mk 11 mod 5 cannon can fire up too 4,000 rounds per minute, with a muzzle velocity of 1012 m/s. Its one-second burst mass is 7.33 kg. The AP shells can penetrate up to 33 mm of armour. The HE shell carries 14 g of explosive, a few hits should be able to destroy a wing or heavily damage any other part of the plane. Maximum effective range of this cannon is up to 2,000 m.

Available ammunition

  • Default: AP-T · HEI · AP-T
  • Air targets: AP-T · HEI · HEI · AP-I
  • Armored targets: AP-T · AP-T · AP-T · HEI
Penetration statistics
Belt Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
Default 42 39 27 18 11 7
Air targets 44 41 29 19 13 8
Armored targets 42 39 27 18 11 7

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

The 20 mm Mk 11 mod 5 is a great weapon for multi-tasking in air battles. You can use it either against ground targets (artillery or AA positions) or against aircraft. However, due to its poor armor penetration, it should not be used in mixed battles as a CAS weapon.

Pros and cons


  • Very high rate of fire (4,000 rpm)
  • Very good damage against aerial targets


  • Low armour penetration; unsuitable for attacking tanks in mixed battles
  • With a high rate of fire, 750 ammo is used rather quickly


Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />.


Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

  • reference to the article about the variant of the cannon/machine gun;
  • references to approximate analogues by other nations and research trees.

External links

USA aircraft cannons
20 mm  AN/M2 · Browning-Colt Mk12 Mod 0 · Browning-Colt Mk12 Mod 3 · FMC T-160
  M3 · M24A1 · M39A1 · M39A2 · M39A3 · M61A1 · M195 · M197 · Mk 11 · Mk 11 mod 5 · T31
30 mm  M230E-1 · XM140 · GAU-8/A · GAU-13/A
37 mm  M4 · M9 · M10
40 mm  M75 · M129
75 mm  M10 · T13E1
20 mm  Hispano 404 (France) · Hispano Mk.II (Britain) · MG 151 (Germany) · Type 99 Model 1 (Japan)
30 mm  ADEN Mk.4 (Britain)

Israel aircraft cannons
20 mm  Hispano Mk.II (Britain) · Hispano Mk.V (Britain) · M50 (France) · M61A1 (USA) · M195 (USA) · M197 (USA) · MG 151 (Germany) · Mk 11 mod 5 (USA)
30 mm  DEFA 551 (France) · DEFA 552 (France) · DEFA 552A (France) · DEFA 553 (France) · M230E-1 (USA)
40 mm  M129 (USA)