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Primed Ammo Stock
Warframe · Mod

Primed Ammo Stock

Primed shotgun magazine-capacity mod

Released Sep 23, 2021

Primed Ammo Stock increases a shotgun’s magazine capacity. Consider it when firing longer between reloads is useful and a standard slot can be spent on capacity.

TypeShotgunPolaritynaramonMax rank10Base drain2VariantStandardRarityLegendary
Primed Ammo Stock GUIDE

Understand Primed Ammo Stock

Useful when…

  • Increase a shotgun’s magazine capacity.
  • Reduce how often a reload interrupts firing, depending on the weapon and build.

Effect and application

Primed Ammo Stock is a Legendary standard-slot shotgun mod with Naramon polarity. It adds +10% Magazine Capacity at rank 0, +60% at rank 5, and +110% at rank 10. The effect concerns magazine capacity; it does not list a fire-rate or reload-speed change.

wiki.warframe.com ↗

Ranks and alternatives

The listed rank 5-to-6 fusion step costs 1,280 Endo and 61,824 Credits; rank 9-to-10 costs 20,480 Endo and 989,184 Credits. Standard Ammo Stock lists +60% magazine capacity at rank 5, while Flawed Ammo Stock lists +20% at rank 3. Primed Ammo Stock explicitly excludes both Ammo Stock and Flawed Ammo Stock, so treat them as alternatives.

wiki.warframe.com ↗

Different shotgun effect

Accelerated Blast lists +60% Fire Rate and +60% Puncture. Those stats do not increase magazine capacity; they address different weapon properties and compete for a standard mod slot.

Limitations and tradeoffs

  • More magazine capacity can mean fewer reload interruptions, while the Primed mod’s final ranks have high listed costs.
  • Capacity competes with other standard-slot shotgun mods.

Common mistakes to avoid

  • Attempting to equip Primed Ammo Stock with Ammo Stock or Flawed Ammo Stock despite the listed exclusions.
  • Expecting magazine capacity to increase fire rate or reload speed.

Effects and reference details

Rank effects and investment

RankListed effectsUnpolarized drainTotal Endo from rank 0Total Credits from rank 0
0+10% Magazine Capacity200
1+20% Magazine Capacity3401,932
2+30% Magazine Capacity41205,796
3+40% Magazine Capacity528013,524
4+50% Magazine Capacity660028,980
5+60% Magazine Capacity71,24059,892
6+70% Magazine Capacity82,520121,716
7+80% Magazine Capacity95,080245,364
8+90% Magazine Capacity1010,200492,660
9+100% Magazine Capacity1120,440987,252
10+110% Magazine Capacity1240,9201,976,436

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

Primed Ammo Stock — 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+10% Magazine Capacity200
1+20% Magazine Capacity3401,932
2+30% Magazine Capacity41205,796
3+40% Magazine Capacity528013,524
4+50% Magazine Capacity660028,980
5+60% Magazine Capacity71,24059,892
6+70% Magazine Capacity82,520121,716
7+80% Magazine Capacity95,080245,364
8+90% Magazine Capacity1010,200492,660
9+100% Magazine Capacity1120,440987,252
10+110% Magazine Capacity1240,9201,976,436

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

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