Helldivers 1:AC-22 Dum-Dum

From Helldivers Wiki
Jump to navigation Jump to search
  Helldivers 2   Helldivers 1    
Fully upgraded AC-22 Dum-Dum
AC-22 Dum-Dum silhouette.png

This 20mm Autocannon is a staple of Helldiver weaponry. Usually reserved for APCs and other vehicles, this is a shoulder carried version for the Helldiver on foot. It is an extremely bulky weapon, but performs very well against medium-armored targets. The Dum-Dum is part of the Weapons equipment kit.

— Armory Description

Stratagem Code

Players must enter the following sequence, using the controller d‑pad, in order to call down this single-use Stratagem during a mission:
Arrow 1 D.pngArrow 2 L.pngArrow 1 D.pngArrow 4 U.pngArrow 4 U.pngArrow 3 R.png

Unlock Requirement

The AC-22 Dum-Dum is a DLC weapon, available at any rank to those who purchase the Weapons Pack.


Upgrade Cost Effect
HD1 Stratagem AC-22 Dum-Dum mk1.png Mk1 Basic variant, no upgrades.
HD1 Stratagem AC-22 Dum-Dum mk2.png Mk2 Research-point.png 2 Increases the fire rate without losing out on accuracy.
HD1 Stratagem AC-22 Dum-Dum mk3.png Mk3 Research-point.png 2 Adds a laser sight, making sure that all rounds land on target.

Weapon Stats

Helldivers start with 3 magazines of Dum-Dum ammunition, and can carry up to 6. Each magazine contains 20 rounds. If 4 or less rounds remain in the magazine when the weapon is fired, the 'low ammunition' warning sound will play.

  • Reload time for a fully emptied magazine is 4 seconds; if reloaded while there are still rounds in the magazine, this drops to 3 seconds. In addition, this keeps a round in the chamber. This means a Dum-Dum with a chambered round gives a total of 21 shots before needing to be reloaded.
    • Reloading immobilizes the Helldiver for the duration.
AC-22 'Dum-Dum' Detailed Analysis
Weapon Info Additional Notes
Unlock Rank Rank 1 Unlocked via DLC
Weapon Type Secondary
Weapon Category Autocannon
Fire Mode Full-auto
Base Upgraded Additional Notes
Damage 600 600
Center Mass Damage 720 720
Status Effect None None
AP Ammo Armor Reduction -15 -15
Base Upgraded Additional Notes
Cyclic Rate of Fire (RPM) 150 200* * Requires Mk2 upgrade
Capacity 20 + 1 20 + 1
Starting Mags 3 3
Max Mags 6 6
Empty Reload Speed 4.0 s 4.0 s Immobilized while reloading
Tactical Reload Speed 3.0 s 3.0 s Immobilized while reloading; keeps one round in the chamber
Min Spread
Max Spread
Spread Increase per Shot 0.75° 0.75°
Max Range 30 m 30 m
Bullet Spread Simulation todo

Gameplay Tips

  • The AC-22 Dum-Dum can be considered a side-grade to the MG-94 Machine Gun and fulfills the same purpose, albeit using a different approach to the same problem. The Dum-dum is a devastating, high precision anti-personnel weapon that can eliminate most light to medium troops in one to two shots and acts as a heavy sniper rifle with has the weight to match, having a much lower turn speed while aiming. It is sheer overkill on most scouts however and Helldivers are encouraged to save ammo for heavier enemies or bring resupply-focused Stratagems if they wish to use the Dum-Dum in place of a primary weapon.
  • The laser sight upgrade is a must for this weapon as it allows for much greater precision at range to ensure all rounds hit their target. This also gives the added benefit of letting divers sweep their aim from one enemy to the next with properly timed firing, making quick work of most patrols well before they can get close enough to sound the alarm.
  • Using a melee attack while aiming completely removes the turn speed restriction of the Dum-Dum and lets the user's aim snap to the cursor immediately. Mastering this technique allows users to quickly snap between targets with enough practice while barely slowing the weapon's rate of fire.
  • The Dum-Dum has limited anti-armor capacities due to its high caliber rounds; it can punch through the body armour of Cyborg Warlords and Hulks if the shot hits center mass. This gives its users some form of last-ditch offense against the more heavily armored enemies if offensive Stratagems or support from teammates is not available.
  • Helldivers are completely immobilized for the duration of the weapon's reload. If necessary, the animation can be cancelled prematurely by switching weapons, diving to prone, or melee-ing to avoid harm or cancel an improperly timed reload.



  • The Dum-Dum is evidently too unwieldy to be used as a melee weapon. When carrying this weapon, Helldivers will perform a melee attack by striking enemies with their fist instead of using the weapon itself. This is purely cosmetic however and attacks will deal the same damage as a regular melee attack.
  • The AC-22 Dum-Dum was re-balanced in Patch 3.02. The weapon now has a higher aim speed.
  • The AC-22 Dum-Dum was re-balanced in Patch 7.00 (again). The weapon now has significantly increased damage at the cost of decreased magazines capacity (from 8 to 6).
Sidearms Assault rifles LMGs Shotguns SMGs Precision Explosive Laser tech Arc tech
P-2 Peacemaker AR-19 Liberator MG-105 Stalwart SG-225 Breaker SMG-45 Defender LHO-63 Camper CR-9 Suppressor LAS-5 Scythe AC-3 Arc Thrower
P-6 Gunslinger AR-22C Patriot SG-8 Punisher MP-98 Knight SMG RX-1 Rail Gun PLAS-1 Scorcher LAS-16 Sickle AC-5 Arc Shotgun
FLAM-24 Pyro AR-20L Justice DBS-2 Double Freedom SMG-34 Ninja M2016 Constitution LAS-12 Tanto
PLAS-3 Singe AR-14D Paragon LAS-13 Trident
Heavy Weapons

MG-94 Machine Gun MGX-42 Machine Gun AC-22 Dum-Dum LAS-98 Laser Cannon FLAM-40 Incinerator TOX-13 Avenger

Obliterator Grenade Launcher MLS-4X Commando RL-112 Recoilless Rifle EAT-17 REC-6 Demolisher M-25 Rumbler

Supply Stratagems

Resupply REP-80 AD-289 Angel AD-334 Guard Dog LIFT-850 Jump Pack Resupply Pack SH-20 Shield Generator Pack SH-32 Directional Kinetic Shield

MG-94 Machine Gun MGX-42 Machine Gun AC-22 Dum-Dum LAS-98 Laser Cannon FLAM-40 Incinerator TOX-13 Avenger Obliterator Grenade Launcher MLS-4X Commando RL-112 Recoilless Rifle EAT-17 REC-6 Demolisher M-25 Rumbler

EXO-44 Walker Exosuit EXO-48 Obsidian Exosuit EXO-51 Lumberer Exosuit M5 APC M5-32 HAV TD-110 Bastion MC-109 Hammer Motorcycle

Defensive Stratagems

A/AC-6 Tesla Tower A/GL-8 Launcher Turret A/MG-11 Minigun Turret A/RX-34 Railcannon Turret Airdropped Anti-Personnel Mines Airdropped Stun Mines Anti-Personnel Barrier AT-47 Anti-Tank Emplacement Distractor Beacon Humblebee UAV drone Thunderer Smoke Round

Offensive Stratagems

Airstrike Close Air Support Heavy Strafing Run Incendiary Bombs Missile Barrage Orbital Laser Strike Railcannon Strike Shredder Missile Strike Sledge Precision Artillery Static Field Conductors Strafing Run Thunderer Barrage Vindicator Dive Bomb

Special Stratagems

Emergency Beacon ME-1 Sniffer Metal Detector NUX-223 Hellbomb Reinforce