Apex Tactical Specialties
FN 509C Extended Magazine Releases
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All FN models · extended magazine releases →
Manufacturer
FN
Model & version
FN 509C / 509C Tactical
Mounting details
MIL-STD-1913 Picatinny
Parts listed
1 total
FN 509CExtended Magazine Releases
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
Apex Tactical Specialties1
Based on manufacturer information — Aug 2026.