The heavy stubber is the Imperium’s answer to a machine gun: a cheap, loud, rapid-firing slug thrower that trades armour penetration for sheer volume of bullets. It’s the most common anti-personnel weapon in the Astra Militarum, and it turns up everywhere from tank pintle mounts to the hands of outlaws and militias.
What the heavy stubber actually is
Picture a big, belt-fed machine gun firing large-calibre rounds. That’s the heavy stubber. A single hit can put a man down, and the rate of fire is what makes it dangerous, not the punch of any one bullet.
It’s also called a heavy stub gun. The design is simple enough that low-tech worlds can churn them out without the infrastructure laser weapons need, and the ammunition is cheap and easy to find. That combination is why it’s everywhere.
- Fires large-calibre solid rounds, sometimes up to 25mm
- Cheap to build, easy to maintain, ammo is plentiful
- Beaten by anything tougher than flak armour
- Less powerful than an autocannon, but far more common
How it’s used on the battlefield
Most patterns are heavy enough that you can’t just shoulder them. They get fired from a bipod or tripod in the prone position, or bolted to a pintle mount on a vehicle. Some lighter builds are man-portable, and the really heavy ones can still be carried by one trooper using a bracing harness or suspensors.
In the Imperial Guard it’s the go-to anti-personnel weapon. It shows up as a crew-served support gun or as a vehicle mount when a storm bolter isn’t available, which is often, since storm bolters are rarer and have much shorter range. Siege regiments lean on it heavily because they take constant losses and have to replace kit with whatever local industry can make.
Why it matters
The heavy stubber is where the Imperium’s logistics meet its battlefields. It’s not glamorous and it won’t crack power armour, but it’s the weapon you can actually supply to a million men across a thousand worlds.
That ubiquity has a side effect. Because heavy stubbers are so widespread, they end up in the hands of Imperial citizens too, and they’re popular with both planetary militias and outlaws. A weapon built for the Guard becomes a weapon anyone can get.
Patterns and variants
There’s no single heavy stubber. The Lexicanum lists well over a dozen patterns, from the Adeptus Arbites’ Bulldog, which can switch between magazine and belt feed and take exotic ammo, to the Cognis, Ironhail, Ironhead, Prefectus, and the wonderfully named Volg VI “Crank Cannon”.
Some are twin-linked, some are pintle-mounted, and some are built for specific vehicles or factions. The variety reflects how easy the design is to copy and adapt.
Heavy stubber vs heavy bolter
This is the comparison that matters most. The heavy bolter hits harder and punches through armour the stubber can’t touch. The stubber answers with volume of fire and a price tag any world can afford.
Against lightly armoured infantry and light vehicles, the stubber is ideal. Against Space Marine armour, it’s nearly useless, though a lucky round can still find a neck joint or another gap and do real damage.
| Heavy stubber | Heavy bolter | |
|---|---|---|
| Penetration | Stopped by better than flak armour | Punches through heavier armour |
| Rate of fire | Very high | High |
| Cost and supply | Cheap, easy to mass produce | Rarer, more demanding |
| Best target | Light infantry and light vehicles | Heavier infantry and armour |
Key facts
- The heavy stubber is a large-calibre projectile weapon, also called a heavy stub gun
- It’s cheap to manufacture and its ammunition is plentiful, so it’s common on low-tech worlds
- It’s the Astra Militarum’s most common anti-personnel weapon
- It can’t reliably penetrate armour better than flak, unlike the heavy bolter
- Many patterns exist, including the Bulldog, Cognis, Ironhail, and Prefectus
- Its weight usually means bipod, tripod, or vehicle pintle mounting
FAQ
Is a heavy stubber better than a heavy bolter?
No, not in raw power. The heavy bolter penetrates armour the stubber can’t. But the stubber is cheaper, easier to supply, and fires faster, which makes it better against hordes of lightly armoured troops.
Can a heavy stubber hurt a Space Marine?
Rarely. Adeptus Astartes armour shrugs off stubber fire, though a lucky shot to the neck or a joint can still cause serious injury.
Why do siege regiments use so many heavy stubbers?
Because they take heavy casualties and have to replace lost equipment with local materials. The stubber is simple enough to build almost anywhere.