Anti-Aircraft Cannon

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Anti-Aircraft Cannon
Backpack Anti-Aircraft Cannon.png
Kill Icons
Killicon aa cannon.png
Basic Information
Used by Heavy
Slot Primary
Ammo loaded 40
Reload type No Reload
Loadout Stats

Anti-Aircraft Cannon

Anti-Aircraft Cannon

Fires explosive shells

Mini-crits airborne enemies on direct hit

-33% explosion splash damage

Weapon has limited range

"Which piece of you should Heavy send home to momma?"

Instead of bullets, this thumping old beast shoots short-range explosive rounds, so fast you can't see them—or airblast them—in flight. They'll detonate when they hit a surface, but they'll also detonate at a fixed range, dealing midair splash damage that's tough to avoid. (We've reassured Heavy that flak cannon explosive rounds are a lot like bullets.)

Anti-Aircraft Cannon publicity blurb

The Anti-Aircraft Cannon, commonly referred to as the AA, is a primary weapon for Heavy, added in the Fight or Flight update. It resembles an anti-aircraft cannon, scaled down so as to be carried by a person. Compared to the stock Minigun, it has a much slower firing rate, less ammo, and a limited effective range. However, it fires high-damage hitscan bullets that explode when colliding with a surface or a player, or after a set distance, dealing splash damage to all enemies in its wake. The user can take damage (but not knockback) from their own explosions, so it is necessary to keep a short distance from whatever they are shooting at. This is assisted by the weapon's high knockback, preventing enemies from closing the distance between them and the Heavy.

In addition, the Anti-Aircraft Cannon will mini-crit enemies who are 128 hammer units above the ground, and will mini-crit enemies who are explosive jumping or using a Jump Pad from any distance. The weapon's high knockback means that enemies can be juggled in the air, allowing for multiple mini-crits on an airborne enemy.


Shot type Hitscan
Damage type Explosive
Ranged or Melee? Ranged
Taunt Cradle
Maximum ramp-up 150% 82
Base damage 100% 55
Maximum fall-off 76.6% 42
Critical 165
Mini-crit 74
Mini-crit (ramp-up) 111
Bullet count 1
Minimum splash 33% 1.7 m
Damage reduction 1% / 1.7 m
Self-damage 41-82
Loaded 40
Function Times
Attack interval 0.55 s
Activation time 1 s
All values are approximate.


  • Part of the publicity blurb for the AA says "Shoot for the moon!". This is part of the quote "Shoot for the moon. Even if you miss, you'll land among the stars". It is commonly attributed to Norman Vincent Peale, who was inspired by the Space Race.


Promotional image of the Heavy with the Anti-Aircraft Cannon, shooting an Engineer using the Jump Pad out of the sky.