The Gunner is the class that stands at the front of every fight. He carries the highest sustained damage of the four dwarves, plus two support tools the rest of the team depends on: a Zipline Gun that gets everyone across any chasm, and a Shield Generator that makes anyone standing inside it close to invulnerable.
The catch is the Minigun’s heat. Learning the overheat math is the difference between a Gunner who carries a Hazard 5 run and one who jams at the worst possible moment. All numbers below come from the Deep Rock Galactic Wiki and the weapon pages.
Primary weapons: Minigun vs Autocannon
| “Lead Storm” Powered Minigun | “Thunderhead” Heavy Autocannon | |
|---|---|---|
| Damage | 10 Kinetic | 14 Kinetic + 9 Explosive area |
| Fire rate | 30 rounds/sec (base) | Slow |
| Reload | Never needs to reload | — |
| Overheats? | Yes | No |
| Extra | 30% stun chance per shot | Explosive rounds damage you at close range |
The wiki’s own class description is blunt about the trade-off: the Autocannon is “slow but fires explosive rounds and is not susceptible to overheating, making it a much better option against swarms.”
The Minigun number almost everyone misreads
The stats say the Minigun fires 30 rounds per second, and the wiki flags this as a common misconception. In actual gameplay the Minigun consumes 2 ammo for every 1 bullet fired — so the effective output is half what the stat suggests, both in bullets and in damage.
That matters for two reasons. First, don’t budget ammo as if you are firing 30 bullets a second. Second, when comparing Minigun and Autocannon damage, the Minigun’s real per-second figure is lower than the raw number implies.
The overheat math
This is the mechanic that decides whether you survive a swarm:
| Heat mechanic | Value |
|---|---|
| Heat gain | 1 per second of sustained fire |
| Maximum heat | 9.5 |
| Default firing duration before overheat | 9.5 seconds |
| Disable duration on overheat | 10 seconds |
| Cooling | Begins when the trigger is released; non-linear, cooling faster over time |
So a Gunner gets roughly 9.5 seconds of continuous fire, then loses the weapon for 10 seconds — slightly longer than he was firing. On high Hazard levels, losing your primary for ten seconds mid-swarm is frequently a wipe.
Three practical consequences:
- Release the trigger before you hit 9.5. Cooling starts the moment you let go, and it cools faster the longer you wait — so short discipline pays compound returns.
- Watch the gauge on the barrel. The wiki notes it pops out on overheat, and that extended firing produces smoke and a rattling sound as early warnings.
- Accuracy rises as you fire. The Minigun has a built-in gyro stabiliser, so it becomes more accurate the longer it stays spun up. The wiki’s advice is to start on close targets and only then reach out to range.
Note that tap-firing while fully revved conserves ammo but is not heat-efficient — the meter rises more sharply on the initial click. Use it only when ammo is genuinely critical.
Sidearms: three options, three jobs
- “Bulldog” Heavy Revolver — the high-damage option. With damage upgrades, a single shot to a weak spot is enough to kill medium-sized Glyphid Grunts outright. It demands accuracy and rewards it.
- BRT7 Burst Fire Gun — does less damage than the Revolver but can be upgraded for larger magazine and reserve ammo, making it the better backup when your primary is down. The wiki notes Hollow Point Rounds increases its damage, and that it is also best used aiming for weak spots.
- Armskore Coil Gun — the unlockable third secondary.
The Revolver-versus-BRT7 choice is really a question of what you need while the Minigun cools: burst damage on a single big target, or sustained backup fire into a crowd.
Grenades
The Gunner picks from three:
- Sticky Grenade — sticks to enemies for improved accuracy.
- Incendiary Grenade — creates a fire explosion.
- Cluster Grenade — on explosion, launches several mini-grenades.
Sticky is the accuracy pick, Incendiary the area-denial pick, Cluster the crowd-clear pick.
Shield Generator: the best support tool in the game
The wiki describes the Shield Generator as doing three things at once: it blocks projectiles, it prevents enemies from entering the space, and it massively increases the regeneration of personal shields — “essentially making one invincible while stood inside.”
That last clause is why Shield Generator timing is the highest-skill part of playing Gunner. The specific uses the wiki calls out:
- Salvage Operations — deploy it over the Uplink or Fuel Cell zones when enemies overwhelm the area.
- Revives — deploy while reviving a downed ally who is being swarmed, protecting both of you.
- Elimination missions — the Gunner is described as “a must-have” here, because his damage output matters against a Dreadnought’s large health pool.
The two limits: your supply is limited, and there is a cooldown between deployments. Do not spend shields on fights you are already winning.
Zipline Gun
The Zipline launches a steel-reinforced cable across pits and chasms, and the whole team can use it. The wiki highlights one specific use worth planning for: it lets teammates carry heavy objects without losing mobility, which is especially strong on Point Extraction missions. Its limit is low ammo.
Putting a build together
- Pick your primary by mission type. Autocannon for sustained swarm fighting where you cannot afford a 10-second disable; Minigun for burst damage and stun-locking big targets (30% stun chance per shot is excellent control against Praetorians).
- Pick your secondary for the Minigun’s downtime. Revolver if you need to delete one dangerous enemy fast; BRT7 if you need sustained fire while cooling.
- Reserve shields for revives and objective defence. Not for chip damage.
- Manage heat before it manages you. Nine and a half seconds is a long time in a fight and a very short time in a swarm.
For weapon modifications and overclock farming, see the upgrades guide and how to get overclocks. The other three classes are compared in the classes guide, gear is covered by the equipment guide, and what you are actually shooting at is in the creatures guide. Mission contexts that change the pick — Salvage, Elimination, Point Extraction — are in the missions guide.