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Amprex
Warframe · Equipment

Amprex

Chain-lightning primary rifle

Released Apr 23, 2014

Amprex is a held, continuous-beam rifle that deals Electricity damage and arcs among nearby enemies. Consider it when you want to sweep through clustered targets instead of aiming separate shots at each one.

TypeRifleMastery requirement10Critical chance32%Critical multiplier2.2
Amprex GUIDE

Understand Amprex

Useful when…

  • Clearing groups of nearby enemies with a beam that can arc between them.
  • Using a rapid-fire primary with a 100-round magazine and strong listed critical stats.

How the beam handles

The normal attack is a hit-scan beam with 22 Electricity damage, a 32% critical chance, a 2.2× critical multiplier, and a 22% status chance. Its held trigger fires at 12 attacks per second. The described arcs support crowd control against nearby groups; the supplied details do not specify arc range or how many targets can be chained, so those should not be assumed.

Practical use and investment

The large 100-round magazine suits sustained firing, but the listed reload takes 2.6 seconds, so avoid emptying it without regard for a lull in combat. Its critical chance and multiplier give a clear reason to consider critical-focused upgrades; the 22% status chance also supports considering status investment. These are build directions, not promises of final damage or a particular result. The rifle requires Mastery Rank 10.

Alternatives with different handling

Alternox is another rifle with Electricity, but its primary fire uses orbs and its alternate fire places a pulsing electric ball that later explodes. Argonak instead offers distinct semi-auto and full-auto hitscan modes. Basmu's description distinguishes explosive bolts from chaining plasma beams and describes health leech after its regenerative battery is fully drained. These are different handling choices, not direct substitutes with identical effects.

Limitations and tradeoffs

  • Sustained firing is supported by a 100-round magazine, while the 2.6-second reload can interrupt it.

Common mistakes to avoid

  • Treating the beam as a single-target shot and overlooking the described arcs among nearby enemies.
  • Assuming the listed 22 Electricity damage specifies the damage of every arc target; the inputs do not explain that interaction.

Effects and reference details

Detailed properties

Critical chance32%
Critical multiplier2.2×
Status chance22%
Listed attack rate12
Accuracy12.5
TriggerHeld
Magazine size100
Reload time2.6 seconds
Multishot1
Foundry Credits25,000
Foundry time24 hours

Attack modes

ModeCritical chanceCritical multiplierStatus chanceDamage types
Normal Attack32%2.2×22%electricity: 22

Each mode has its own properties. Alternate forms may require additional unlocks; these values are not combined build damage.

References and version

Game data version: Pinned public export

Amprex — WARFRAME Wiki ↗
Technical source data for verification

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Mod capacity and investment

Unranked base capacity: 15 + one per two Mastery Ranks through MR30. Legendary ranks add one each. Rank-40 equipment unlocks two extra ranks per installed Forma.

Eight standard slots

Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Slot 8
0Drain
30Capacity
30Remaining

The selected mods fit the verified slot, applicability and capacity constraints.

Upgrading these mods from their entered owned ranks costs 0 Endo and 0 Credits. Your shared Endo and Credits are allocated in My plan.

Select actual installed polarities. A planned polarity change requires the appropriate Forma and resets equipment rank. Conditional combat effects and unmodeled advanced upgrades stay separate.

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