Explosive Ammo Rust: Cost & How Many Per Door (2026)

Explosive ammo is the raiding tool everyone underrates. It is not flashy like C4 and it does not have the reach of a rocket, but priced in sulfur it is the single cheapest way through almost every door in Rust. One round costs 25 sulfur, and on a sheet metal door that adds up to less than three quarters of what a Timed Explosive Charge would burn to do the same job.

The full name is Explosive 5.56 Rifle Ammo, and it loads into any 5.56 rifle you already carry: the AK, the LR-300, the Semi-Automatic Rifle, the Bolt Action and the M249. That is the whole appeal. No separate launcher, no throwing arc, just a magazine of rounds that eat doors, window bars and tool cupboards for a fraction of the sulfur of a proper explosive. This guide covers the recipe, the real cost, exactly how many rounds every wall and door needs, which guns to shoot it out of, and when explosive ammo is the wrong call.

• What It Is
• Crafting Recipe
• The Real Sulfur Cost
• How Much for Every Target
• The Door Numbers
• Vs C4, Rockets & Satchels
• Which Guns Fire It
• How to Use It
• Finding It in Loot
• Myths & Mistakes
• Pro Tips
• FAQ

What Is Explosive 5.56 Ammo in Rust?

Explosive 5.56 Rifle Ammo is a raiding round that the game files list under the shortname ammo.rifle.explosive. It looks like a normal rifle cartridge and it feeds into the same magazine as your standard 5.56, but instead of a clean bullet it carries a small charge that detonates on impact. Facepunch’s own description is blunt about it: the round explodes on contact and deals a small amount of fragmentation damage to nearby objects.

That splash is the whole point. A single round does very little on its own, but a magazine of them chewing on a door adds up fast, and because the damage lands wherever you can point a rifle, there is no throwing arc to misjudge and no overhang to block a rocket. You just hold the trigger and the door comes apart.

It is a raiding tool first and a weapon second. Against players the explosive round is actually worse than a normal bullet: it flies slower and its direct damage is low, so nobody picks explosive ammo for a gunfight. Where it earns its place is structure damage per unit of sulfur, and on the right targets nothing in the game beats it.

How to Craft Explosive 5.56 Ammo

The recipe is short and, unlike C4, genuinely cheap to run. One craft gives you two rounds, not one, which trips up a lot of players doing the maths.

That batch of two rounds needs a Workbench Level 3 and takes 3 seconds. Divide it out and a single round is 10 Gun Powder, 5 Metal Fragments and 5 Sulfur. Because gun powder is itself 2 sulfur and 3 charcoal each, the round unpacks all the way down to 25 sulfur, 30 charcoal and 5 metal fragments. Charcoal you already have in piles from smelting, so the number that actually costs you is the sulfur.

The blueprint is 60 scrap at a research table, which is one of the cheapest raiding unlocks in the game. You can also tech tree it at Workbench 3. Either way, once it is learned you can print rounds all wipe as fast as you can farm the sulfur.

The Real Cost: 25 Sulfur a Round

Every raiding decision in Rust comes back to sulfur, and explosive ammo has the smallest unit price of any explosive in the game.

The reason the number feels low is that explosive ammo spreads its cost across a lot of tiny rounds instead of one big item. A C4 charge is 2,200 sulfur in a single throw. Explosive ammo is 25 sulfur a shot, so you buy exactly as much boom as the target needs and not a scrap more. On small targets that granularity is a huge saving, and our Rust raid calculator exists precisely to price it out for you before you commit.

How Much Explosive Ammo for Every Wall and Door

This is the chart people actually come for. Every value below is vanilla and assumes an AK with every shot landing on the same tile. Miss shots or use a different rifle and the count shifts a little, which we cover further down.

Two things jump out. First, the tool cupboard is 8 rounds, which is 200 sulfur. If you can reach a TC through a window or a soft wall, you can shut down a base’s ability to repair for the price of a rounding error. Second, look at the gap between doors and walls. A sheet metal door is 63 rounds but a sheet metal wall is 400. Explosive ammo is a door and soft target tool, and it falls off a cliff the moment you point it at a hard wall.

The Door Numbers Explained

Since doors are the whole reason to carry this round, they are worth spelling out. These are the counts most people search for.

• Sheet metal door: 63 rounds, 1,575 sulfur. The classic explosive ammo target. A C4 would cost 2,200, so you save over 600 sulfur every time you shoot one open instead.
• Garage door: 150 rounds, 3,750 sulfur. That is a little over four AK magazines of explosive ammo. Bring more than you think, because a garage door is deceptively chunky at 600 health.
• Armored door: 250 rounds, 6,250 sulfur. Still cheaper than 3 C4 at 6,600, but this is the point where a lot of raiders switch to C4 anyway to save time and gun wear.
• Wooden door: 18 rounds, 450 sulfur. Barely worth a full mag. On an early wipe base a wooden door is basically free to open.

Explosive Ammo vs C4, Rockets and Satchels

Priced per item in sulfur: a C4 is 2,200, a rocket is 1,400, a satchel is 480 and a single explosive round is 25. Put them head to head on doors and the pattern is clean.

So explosive ammo wins every door and C4 wins every wall. The mistake beginners make is C4ing a sheet metal door, which burns 40% more sulfur than needed. The mistake experienced players sometimes make in the other direction is trying to shoot open a stone wall, where the round is fine on paper but a nightmare in practice.

Sulfur is not the only currency, though. Explosive ammo is loud for a long stretch, it takes real time on target, and it wears your gun down. On an online raid where a defender is logging teammates in, paying a few hundred extra sulfur to be through a door in seconds with a satchel or a charge can absolutely be the right call. Run your exact target through the raid calculator and decide with the numbers in front of you.

Which Guns Fire Explosive Ammo

Explosive 5.56 loads into anything that takes standard 5.56 Rifle Ammo, so you do not craft or carry a special weapon for it.

How to Use Explosive Ammo in Rust

Mechanically it is just shooting, but a few habits make a raid go faster and cost less.

1. Load a full magazine of explosive 5.56 and stand as close to the target as you safely can. Point blank loses no rounds to travel and keeps every shot on the same tile.
2. Fire at a single spot on the door or object. Spreading shots across the surface does not help, all the health is shared, so keep the crosshair still.
3. Watch for anything soaking your shots. Door frames, window bars and deployables in front of the real target will happily eat a magazine.
4. Reload and keep going until it breaks. There is no arming time and no cover needed, but the noise carries, so expect company on a populated server.
5. When the door drops, switch to normal ammo before you push. Explosive rounds are poor against players, and you do not want to fight the defender with the worst combat ammo in the game loaded.

Because the round explodes on you as much as on them at extreme close range, do not press your own muzzle into the surface if you are low on health. The splash can chip you. A step back is plenty.

Where to Find Explosive Ammo in Loot

You do not have to craft every round. Finished explosive 5.56 spawns in mid and high tier containers, often in stacks, so a good loot run can hand you a raid’s worth for free.

The hackable Locked Crate is the standout at roughly a 30% chance to pay out a stack of 30 rounds. That single crate is most of a sheet metal door in one hit. If you are already running monuments for scrap, you are farming explosive ammo at the same time whether you meant to or not, which is why a keycard run feeds straight into your raiding economy.

Myths and Common Mistakes

Myth: explosive ammo is a good weapon. It is not. It is slow, it has weak direct damage and it wears your gun out. It is a raiding round that happens to come out of a rifle, and against players you are better off with normal 5.56.

Myth: you need the soft side. You do not. Explosives deal identical damage to both faces of a structure. The soft side rule is for melee and plain bullets only.

Myth: it is only good on doors. Mostly true, but the tool cupboard is the sleeper. At 8 rounds it is the cheapest way to take a TC in the game if you can reach one.

Mistake: crafting without a Workbench 3. The recipe stays greyed out no matter how much gun powder you are holding. Confirm the bench before you haul materials across the map.

Mistake: bringing exactly enough. Miss a few shots, hit a door frame, or use a Semi-Automatic instead of an AK and your count creeps up. Always pack a spare magazine.

Mistake: shooting a stone wall. The calculator says 185 rounds and your rifle says no. Anything above a sheet metal door wants C4, satchels or rockets, not a magazine of explosive 5.56.

Pro Tips for Raiding with Explosive Ammo

• Doors, not walls. The round wins every door on sulfur and loses every wall to C4. Let that decide what you shoot.
• Go for the tool cupboard. Eight rounds through a window at the TC stops all repairs and is cheaper than a single satchel.
• Bring a spare rifle. Explosive rounds gut weapon condition. A second gun finishes the raid the first one started.
• Loot before you craft. One hackable crate can hand you 30 rounds. Always grab explosive ammo when you see it.
• Count your magazines. A garage door is 150 rounds, over four AK mags. Under-packing is the most common way a raid stalls.
• Use it offline. The noise gives you away. Explosive ammo is at its best on a base with nobody home to hear it.

Explosive Ammo Rust FAQ

Final Thoughts

Explosive ammo is the quiet workhorse of Rust raiding. It will never open an armored wall and it will never win you a gunfight, but on doors it is the cheapest boom in the game and it comes out of a rifle you already own. Learn the recipe for 60 scrap, keep the sulfur cost of 25 a round in your head, and let one rule sort your loadout: doors and tool cupboards get explosive ammo, walls get C4.

Do that, loot every round you can instead of crafting them, and pack a spare magazine, and explosive 5.56 turns from the ammo you ignore into the thing that pays for half your raids.

Sources

• Recipe, stack size, workbench, blueprint cost and item data: Facepunch Wiki, Explosive 5.56 Rifle Ammo
• Loot sources, stack drop amounts and item stats: RustHelp, Explosive 5.56 Rifle Ammo
• Weapon compatibility, gun wear and combat behaviour: Corrosion Hour, Explosive 5.56 Rifle Ammo
• Explosive damage applying equally to hard and soft sides: Rustafied, Raiding in Rust
• Raid quantities cross checked against our own Rust raid calculator
• The game itself: Facepunch Studios