Firearm modelsModels: 1,027
PartsParts: 5,395
FitmentsFits: 121,240

FN 509 Midsize Triggers

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Manufacturer

FN

Model & version

509 Midsize · Midsize

Mounting details

MIL-STD-1913 Picatinny

Parts listed

5 total

FN 509 MidsizeTriggers

Find a part in this list

5 triggers

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 Specialties5

Apex Tactical Specialties
Action Enhancement Kit for FN 509
Based on manufacturer information — Aug 2026.
Apex Tactical Specialties
Durable Striker for FN 509
Source needs review.
Apex Tactical Specialties
Failure Resistant Extractor for FN 509
Source needs review.
Apex Tactical Specialties
Slide Maintenance Kit for FN 509
Source needs review.
Apex Tactical Specialties
Striker Components Kit
Based on manufacturer information — Oct 2026.