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FN FNS 9 Longslide
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What the compatibility labels mean
How we knowHow we check compatibility
- Lab testedFit checked by Firearm Lab for the recorded setup.
- Documented fitmentSupported by manufacturer, partner, or reviewed community evidence.
- Interface matchMounting details match, but this exact model and part have not been confirmed to fit together.
Check your exact model and part before ordering. Fitment limits
Model details
Manufacturer
FN
Model & version
FNS
Mounting details
MIL-STD-1913 Picatinny
Compatibility records
79
Lights & rail fitment
Sights
Sights
6 listed- Meprolight
MEPRO TRU-DOT FIXED SIGHTS - FNX/FNS 9MM/.40S&W
Manufacturer documented - Warren Tactical
Fiber Optic Front Sight – Serrated (FNS)
Manufacturer documented - Warren Tactical
Fiber Optic Set, Plain Rear Sight and Fiber Optic Front Sight (FNS)
Manufacturer documented - Warren Tactical
Plain Rear Sight (FNS)
Manufacturer documented
Also on this pistol
Holsters
3 makers- DeSantis Gunhidechecked 2026-11-01
- Safarilandchecked 2026-11-01
- Vedder Holsterschecked 2026-11-01
Check each manufacturer’s options for your model, light and optic.
Grip & magwells
Categories with no listings (14)
About the FN FNS 9 Longslide
- Type
- Pistol
- Manufacturer
- FN
- Model & version
- FNS
- Caliber
- 9mm
- Mounting details
- MIL-STD-1913 Picatinny
- Status
- Discontinued — compatibility records remain available
Other versions of the FNS
Compare versions and check the details for your exact model.
- FN FNS 40Same recorded mounting details. Check each part for additional requirements.
- FN FNS 40 CompactSame recorded mounting details. Check each part for additional requirements.