Dual Automatic Gun M2 (40 mm)

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The Bofors 40 mm is a heavy autocannon used mainly by the United States, occasionally finding use amongst the British and the German vehicles. Introduced around the Second World War, the Bofors 40 mm gave itself a good name due to its reliability as a cannon and general effectiveness.

Vehicles equipped with this weapon

General info

The Bofors 40 mm has a medium rate of fire.

Available ammunition

Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).

Comparison with analogues

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

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.

Pros and cons


  • Powerful 40 mm HEF-I shells (Mk.II) with high amounts of explosive filler that can shred planes to pieces with successful 1 hit
  • The M81A1 AP rounds can easily deal with sides of medium tanks and can damage cannon barrel and tracks
  • Acceptable muzzle velocity for the gun
  • Acceptable rate of fire


  • The 40 mm shell penetrates up to 76 mm of armour, not enough to deal with some German SPAAs
  • Muzzle velocity and rate of fire are not really good
  • High leading angle is needed to hit the enemy aircraft
  • Not suitable gun for higher tiers, especially against jets


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 If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: https://wiki.warthunder.com/(Weapon-name)/History) 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

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  • topic on the official game forum;
  • encyclopedia page on the weapon;
  • other literature.

Britain and USA anti-aircraft guns
7.92 mm  BESA
12.7 mm  M2HB
20 mm  GAI C01 · M168 · Oerlikon Mk.II · Polsten
25 mm  GAU-12U
30 mm  HSS 831L
35 mm  GA-35 · Oerlikon KDA
37 mm  M1A2
40 mm  Bofors L/60 · Dual Automatic Gun M2 · M266

Japan anti-aircraft guns
20 mm  Type 98 Anti-Air Gun
12.7 mm  M2HB (USA)
20 mm  Rh202 (Germany)
35 mm  Oerlikon KDA (Swiss)
40 mm  M2 Dual Automatic Gun (USA)

China anti-aircraft guns
25 mm  PG87
35 mm  PG99-35-2
37 mm  Type 65
57 mm  WA318
12.7 mm  M2HB (USA)
20 mm  KwK30 (Germany)
40 mm  Dual Automatic Gun M2 (USA)