Apex Tactical Specialties
FN 509 Compact MRD w/ Compensator Triggers
Browse parts and check the source behind each answer.
Manufacturer
FN
Model & version
509 Compact MRD w/ Compensator
Mounting details
MIL-STD-1913 Picatinny, FN Low-Profile Optics Mounting System
Parts listed
1 total
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 — Oct 2026.