Understand Flawed Expel Grineer
Useful when…
- Fitting a Grineer-specific mod into a pistol build with limited capacity.
- Using a lower-rank option while deciding whether to invest in a stronger variant.
Effect and fit
The mod increases pistol damage against Grineer: its listed effect is x1.03 at rank 0, x1.08 at rank 2, and x1.1 at its maximum rank of 3. It is a Flawed, standard-slot pistol mod with Madurai polarity and base drain 2. It cannot be equipped with Expel Grineer or Primed Expel Grineer.
Practical use
Use it when Grineer are the intended targets and the lower base drain helps the pistol’s capacity budget. Its faction bonus does not apply to other enemy factions. Accelerated Isotope offers listed Radiation damage and fire rate instead, so it serves a different purpose rather than being a direct faction-mod replacement.
Rank investment
Its maximum rank is 3. The listed example costs are 20 Endo and 966 Credits for rank 0 to 1, 40 Endo and 1,932 Credits for rank 1 to 2, and 80 Endo and 3,864 Credits for rank 2 to 3. The final step reaches x1.1 damage to Grineer. Consider the modest maximum effect against the value of keeping the slot and capacity available for other mods.
Compare the standard and Primed versions
Expel Grineer lists x1.3 damage to Grineer, maximum rank 5, and base drain 4. Primed Expel Grineer lists x1.55, maximum rank 10, and base drain 4. The Flawed mod’s lower drain can suit a constrained build, while the alternatives list higher faction bonuses; the variants cannot be equipped together.
Limitations and tradeoffs
- Its maximum listed bonus is x1.1 against Grineer, lower than the standard and Primed versions.
- It has base drain 2, but that advantage matters only if the faction-specific effect fits the build.
- It cannot be equipped with the standard or Primed versions.
Common mistakes to avoid
- Assuming the Grineer bonus applies against other factions.
- Equipping it alongside Expel Grineer or Primed Expel Grineer.
- Spending Endo on maximum rank without considering whether the low maximum bonus and faction condition fit the pistol build.






