FN
FN 509 Fullsize Magazines
Browse parts and check the source behind each answer.
Manufacturer
FN
Model & version
509 Fullsize · Fullsize
Mounting details
MIL-STD-1913 Picatinny
Parts listed
5 total
FN 509 FullsizeMagazines
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
FN5
Based on manufacturer information — Aug 2026. 509 - 9mm Mag 10RD FDE
509 - 9mm Mag 17RD BK
509 - 9mm Mag 17RD FDE
509 9MM 24RD MAGAZINE KIT