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Spring-Loaded Chamber
Warframe · Mod

Spring-Loaded Chamber

Reload-triggered assault rifle fire-rate mod

Released Jan 25, 2016

Spring-Loaded Chamber grants a temporary fire-rate bonus while aiming after a reload. Consider it for compatible assault rifles when you can use the aiming condition during its limited duration.

TypeAssault RiflePolaritymaduraiMax rank5Base drain2VariantStandardRarityUncommon
Spring-Loaded Chamber GUIDE

Understand Spring-Loaded Chamber

Useful when…

  • Gain temporary fire rate after reloading while aiming.
  • Use on a compatible assault rifle in a standard slot.

Trigger and duration

At rank 5, reloading grants +75% fire rate when aiming for 9 seconds. At rank 0, it grants +12.5% for 2 seconds. Both the reload trigger and aiming condition matter; it is not described as a permanent fire-rate increase.

Fit and ranking

This standard Madurai mod is for assault rifles, has base drain 2, and reaches rank 5. The listed costs are 20, 40, 80, 160, and 320 Endo, plus credits increasing from 966 to 15,456 per step. At rank 3, it grants +50% fire rate while aiming for 6 seconds. Higher ranks extend both the bonus and duration, making the last ranks relevant when you can use the trigger consistently.

wiki.warframe.com ↗

Similar aiming mods are distinct

Guided Ordnance grants accuracy after a hit while aiming, not fire rate. Gun Glide is a Conclave Exilus mod that improves recoil and accuracy while sliding. Loose Hatch improves reload speed but also increases recoil, and is a Conclave standard-slot mod. These effects do not replace Spring-Loaded Chamber's reload-triggered, aiming-only fire-rate bonus.

Limitations and tradeoffs

  • The fire-rate bonus requires a reload and applies only while aiming for a limited duration.
  • It is compatible with assault rifles rather than all rifles.

Common mistakes to avoid

  • Do not expect the bonus to apply when firing without aiming.
  • Do not confuse it with Guided Ordnance's accuracy bonus or Loose Hatch's reload-speed bonus.

Effects and reference details

Rank effects and investment

RankListed effectsUnpolarized drainTotal Endo from rank 0Total Credits from rank 0
0On Reload: +12.5% Fire Rate when Aiming for 2s200
1On Reload: +25% Fire Rate when Aiming for 3s320966
2On Reload: +37.5% Fire Rate when Aiming for 5s4602,898
3On Reload: +50% Fire Rate when Aiming for 6s51406,762
4On Reload: +62.5% Fire Rate when Aiming for 8s630014,490
5On Reload: +75% Fire Rate when Aiming for 9s762029,946

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

Spring-Loaded Chamber — 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 ↗

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