Apex Tactical Specialties
FN 503
Explore parts, discover makers and check what fits your model.
Only you can see your saved models.
Choose a part to see sources and fitment details.
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
Model details
Manufacturer
FN
Model & version
FN 503
Mounting details
Not recorded
Compatibility records
11
Also on this pistol
Holsters
4 makers- ANR Designchecked 2026-07-30
- Galcochecked 2026-11-01
- Safarilandchecked 2026-11-01
- Vedder Holsterschecked 2026-11-01
Check each manufacturer’s options for your model, light and optic.
Triggers & internals
Triggers
1 listedGrip & magwells
Magazines
1 listedCategories with no listings (15)
About the FN 503
- Type
- Pistol
- Manufacturer
- FN
- Model & version
- FN 503
- Mounting details
- Not recorded
- Width
- 1.1"
- Height
- 4.6"
- Weight
- 21 oz
- Barrel length
- 3.1"
- Overall length
- 5.9"