FPS Softair M90 AEG Spring (90 m/s, FPS-90+)
The M90 is the gentlest spring in the FPS Softair AEG line-up on our shelves, rated at 90 m/s. It's a sensible pick if you want to bring an AEG down to a lower power level, and you can step up to the M95 later if you need a touch more.
FPS set the rating using a gearbox with a type D cylinder and a 363mm inner barrel, so it's tuned for barrels of 301–400mm. Outside that range, expect the result to shift: shorter barrels read lower, longer ones higher.
Key specs
- Rating: 90 m/s (M90)
- Calibration set-up: type D cylinder, 363mm inner barrel
- For inner barrels of 301–400mm
- Bearings not included in calibration: FPS puts it at about 2.5 m/s per bearing in the spring guide and piston head
- Made in Italy
- SKU: FPS-90+
Check your velocity on a chronograph after fitting, especially if your build uses bearings.
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