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Ammo Drum
Warframe · Mod

Ammo Drum

Rifle Exilus mod that increases ammunition capacity.

Released Oct 25, 2012

Ammo Drum increases a rifle’s maximum ammunition by up to 90%. Consider it when reserve capacity matters and a Rifle Exilus slot is available; it does not improve damage or weapon handling.

TypeRiflePolaritynaramonMax rank5Base drain2VariantStandardRarityCommon
Ammo Drum GUIDE

Understand Ammo Drum

Useful when…

  • Increase maximum ammunition for a rifle.
  • Use a Rifle Exilus slot to address an ammo-capacity constraint.

Effect and fit

Ammo Drum grants +15% Ammo Maximum at rank 0, +60% at rank 3, and +90% at rank 5. It is a standard Rifle Exilus mod with Naramon polarity and base drain 2. It is incompatible with Flawed Ammo Drum.

wiki.warframe.com ↗

Investment

The first rank costs 10 Endo and 483 Credits; the rank 4-to-5 step costs 160 Endo and 7,728 Credits. The final rank adds 30 percentage points over rank 3. Consider whether that extra capacity is worth the upgrade costs and Exilus slot for the rifle you are using.

wiki.warframe.com ↗

Other Exilus effects

Flawed Ammo Drum reaches +10% Ammo Maximum and cannot be equipped with this standard mod. Aerial Ace refreshes double jump on kills while airborne, and Agile Aim provides +20% movement speed when aiming in its Conclave variant; neither supplies the ammo-capacity effect.

Limitations and tradeoffs

  • Uses a Rifle Exilus slot for capacity instead of another effect.
  • Does not address damage, reload speed, or ammo pickup behavior in its stated effects.

Common mistakes to avoid

  • Equipping Ammo Drum together with its incompatible flawed variant.
  • Treating increased ammo maximum as increased damage or faster pickups.

Effects and reference details

Rank effects and investment

RankListed effectsUnpolarized drainTotal Endo from rank 0Total Credits from rank 0
0+15% Ammo Maximum200
1+30% Ammo Maximum310483
2+45% Ammo Maximum4301,449
3+60% Ammo Maximum5703,381
4+75% Ammo Maximum61507,245
5+90% Ammo Maximum731014,973

These are listed mod effects and fusion costs, not final build damage. Matching and mismatched polarities change capacity. Totals assume starting at rank 0.

References and version

Game data version: Pinned public export

Ammo Drum — WARFRAME Wiki ↗wiki.warframe.com ↗
Technical source data for verification

These machine-readable game records support the calculations and factual checks. The wiki references above are intended for reading.

Warframe Public Export ↗Raw game data (JSON) ↗wiki.warframe.com ↗

Original data record ↗

Optional: calculate an upgrade or configurationOpen the calculator when you want a cost estimate or a compatibility check.
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Fusion cost and capacity

0Endo
0Credits
2Target slot drain
RankObserved effectDrainEndo from 0Credits from 0
0+15% Ammo Maximum200
1+30% Ammo Maximum310483
2+45% Ammo Maximum4301,449
3+60% Ammo Maximum5703,381
4+75% Ammo Maximum61507,245
5+90% Ammo Maximum731014,973

Slot polarity changes drain; fusion prices depend on mod rarity and family.

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