Meprolight
FN FNS 9 Longslide Sights
Browse parts and check the source behind each answer.
Manufacturer
FN
Model & version
FNS
Mounting details
MIL-STD-1913 Picatinny
Parts listed
6 total
FN FNS 9 LongslideSights
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
Meprolight1
Based on manufacturer information — Nov 2026.
Warren Tactical5
Fiber Optic Front Sight – Serrated (FNS)
Fiber Optic Set, Plain Rear Sight and Fiber Optic Front Sight (FNS)
Plain Rear Sight (FNS)
Sevigny Competition Fiber Optic Set: Plain Rear Sight and Fiber Optic Front Sight (FNS)
Sevigny Competition, Plain Rear Sight (FNS)