AC-8 Autocannon

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A fully-automatic cannon effective against light vehicle armor. Includes support backpack required for reloading.

— Ship Management Terminal

The AC-8 Autocannon also known as the AC, is a support weapon that fires large caliber, light vehicle armor piercing, high-explosive shells. It is capable of firing either semi-automatic or fully automatic, with the latter increasing its already substantial recoil. It unlocks at Rank 10.

It is capable of penetrating light vehicle armor, with a small AoE explosion when the round impacts. The explosions do not have the same damage radius of the GL-21 Grenade Launcher, but do have the ability to deal heavy damage to enemy weak points. Unlike most weapons, the AC-8 Autocannon is not reloaded with magazines, but from x2 5-round clips from the associated backpack. Due to this, it is not possible to reload while there are more than 5 rounds in the internal magazine.

Stratagem Statistics

Call-in Time Standard 3 seconds
Upgraded 0 seconds
Uses unlimited
Cooldown Standard 480 seconds
Upgraded 432 seconds

Detailed Weapon Statistics

AC-8 Autocannon
Fire Rate 250 rpm
Cooldown 480 sec
Call-in Time 3 s
Capacity 10
Reload Time 5.2 s
Tactical Reload 1.7 s
Clip Capacity 5
Spare Clips 10
Starting Clips 10
Clips from Supply 5
Cannon 20mm APHET Projectile
APHET 20mm Explosion
Cannon 20mm APHET
Caliber 20 mm
Mass 120 g
Initial Velocity 820 m/s
Drag Factor 30%
Gravity Factor 100%
Penetration Slowdown 55%
Standard 260
vs. Durable 260
Direct Armor AP4 Icon.png Medium II
Slight Angle Armor AP4 Icon.png Medium II
Large Angle Armor AP4 Icon.png Medium II
Extreme Angle Armor AP0 Icon.png Unarmored
Special Effects
Demolition Force 30
Stagger Force 30
Push Force 20
APHET 20mm
Area of Effect
Inner Radius 2 m
Outer Radius 4 m
Shockwave Radius 5.5 m
Inner Radius 150
Outer Radius 149 - 0
Inner Radius Armor AP3 Icon.png Medium I
Outer Radius Armor AP2 Icon.png Light II
Shockwave Armor AP3 Icon.png Medium I
AoE Effect
Demolition Force 30
Stagger Force 40
Push Force 40

Tactical Information

  • The Autocannon has a 10-round internal magazine that is reloaded via 5-round clips pulled from the associated backpack.
    • Reloading while carrying the backpack causes the Helldiver to drop to one knee and remain immobile during the animation, so be sure to reload only when it's safe to do so.
    • Reloading a single clip takes 2 seconds, but reloading the entire magazine from empty takes about 5 seconds, due to the Helldiver needing to cycle the bolt in addition to loading the two clips.
      • The optimal strategy therefore is to never let the magazine run empty, as it is for all other magazine-fed weapons. As long as there's one round left in the chamber, there's no need to cycle the bolt, saving 2 seconds on reload time.
    • If the magazine is empty, Helldivers may choose to only load half the magazine and cancel loading the other clip by diving, crouching, switching weapons, or opening the stratagem menu. Helldivers are advised to not attempt to cancel the reload by pressing the fire button, as this will discharge the Autocannon, which during reload is pointed at the ground right in front of the wielder. Helldivers will die instantly.
    • The Autocannon's wielder can carry the ammo backpack, but if a teammate carries that backpack instead, reloading is much faster, facilitating more rounds sent downrange.
  • Ammo Boxes will add 2 clips to the backpack, and a Resupply box will add 5 ( 10 if Superior Packing Methodology has been unlocked).
  • Helldivers are advised to not fire at enemies at point-blank range. The explosion from the Autocannon's explosive rounds will kill the wielder.
  • It is the only weapon currently in the game that utilizes en-bloc clips to feed an internal magazine.
  • It is a very well-rounded weapon system and highly effective against the Automatons.
  • It is somewhat difficult to precisely aim if not taking significant time to remain stable, and the explosion area on impact is small. Therefore - while it is effective against tight clusters of small enemies, medium-sized enemies, and weak spots of larger enemies, making it a very flexible choice with long-range - its main weakness is dealing with spread-out small targets, like Hunters approaching from multiple directions or a crossfire from Troopers, especially if said enemies should close into melee range.
    • It is highly advised to crouch or go prone when possible to fire the weapon for reduced recoil and better handling.


Target Hits Notes
Scavenger 1 Anywhere
Pouncer 1 Anywhere
Bile Spitter 1 Anywhere
Hunter 1 Anywhere
Hive Guard 1 Head, it will bleed out
Warrior 1 Head
Brood Commander 1 Head
Stalker 1-3 Head (hard to hit)
Nursing Spewer 1 Head
2 Abdomen
Bile Spewer 1 Head
2 Abdomen
Charger 2 Interior of leg (hard to hit)
3-4 Abdomen, it will bleed out
Spore Spewer 9 Anywhere
Shrieker Nest 9 Anywhere
Bug Hole 1 Aim directly at the hole
Target Hits Notes
Trooper 1 Anywhere
Berserker 1 Head
3 Waist
Devastator 1 Head
2-3 Waist
Scout Strider 2-3 Crotch or Leg
Gunship 2 Thruster
Hulk 2 Head (Eye)
3 Heatsink, it will bled out
Tank 3 Heatsink
Cannon Turret 3 Heatsink
Factory Strider 6 Undercarriage Door
6 Eye
Anti-Air Emplacement 4 Anywhere
Mortar Emplacement 4 Anywhere
Bot Fabricator 1 Ricochet off of the vent door at a sufficient angle.
Target Hits Notes
Broadcast Tower 1 Anywhere
Rogue Research Station 1 Generator on top

Affected by

The following Ship Modules affect the AC-8 Autocannon:

Department Ship Module Effect
Streamlined Request Process Decreases Support Weapon stratagem cooldown by 10%.
Superior Packing Methodology Resupply Stratagem boxes refill Support Weapons with the maximum number of carriable magazines.
Payroll Management System Reduces reload time for all support weapons by 10%.
Bridge Morale Augmentation Reduces cooldown time for all Stratagems by 5%.
Streamlined Launch Process All Support Weapon stratagems launch immediately once called in, reducing overall deployment time.


Tutorial Video Demonstrating Use of the AC-8 Autocannon

Change History




  • Explosive weapons no longer pull players inward from the blast.