Meprolight
FN FNS 40 Sights
Browse parts and check the source behind each answer.
Manufacturer
FN
Model & version
FNS
Mounting details
MIL-STD-1913 Picatinny
Parts listed
8 total
FN FNS 40Sights
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
Meprolight2
Based on manufacturer information — Oct 2026. MEPRO TRU-DOT FIXED SIGHTS - FNX/FNS 9MM/.40S&W
Trijicon1
HD XR Front Sight - FNS-40, FNX-40, FNP-40
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)