Custom KYDEX® Holsters for the FN 503
The FN 503 was FN’s quiet entry in the slim single-stack wars — a 6+1 micro nine with FN’s build quality in a pocket-flat frame, discontinued when the Reflex took its slot, and still riding every day in the holsters of people who chose it on purpose. Finding a new holster shouldn’t be the hard part of owning one. ANR Design builds custom KYDEX® FN 503 holsters precision-formed in Manchester, NH on a dedicated 503 shell — and unlike most of the industry, we didn’t drop it when FN did: both right- and left-handed builds qualify for our fastest Quick Ship tier. Carry it IWB, in our standard OWB, in the Nidhogg, or in the Master Blaster AIWB platform. Configure yours below.
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FN 503 Fitment & Compatibility
Our FN 503 holsters are molded on a dedicated shell formed to the slim single-stack’s actual geometry — its own fitment, not an adapted Reflex or 509 mold. A gun this small lives or dies on precise molding: retention clicks on the trigger guard with the same authority as our full-size holsters, at pocket-gun scale.
Every FN 503 holster clears suppressor-height sights as standard, with optic accommodation for slide-milled micro red dots.
Carry Options for the FN 503
Inside the Waistband (IWB): Deep concealment is the 503’s whole mission, and our IWB rig completes it — in-house concealment claw, your choice of injection-molded clips, heat-treated DCC Monoblock steel, or the NeoMag Alias system, with ride height and cant adjustment. Both right- and left-handed builds qualify for our fastest Quick Ship tier.
Master Blaster AIWB: The 503 pairs with our Master Blaster platform — purpose-built appendix carry for subcompact and slim-frame guns.
OWB — Standard & Nidhogg: The same dedicated 503 fitment outside the waistband — belt carry on the Standard OWB, range or backup-gun configurations on the Nidhogg.
Spare Magazines: The FN 503 has its own dedicated fitment in our Pistol Mag builder, built to pair with any holster above.
Frequently Asked Questions
Do you still make FN 503 holsters?
Yes — actively, in every platform we build, with both right- and left-handed builds shipping from our fastest Quick Ship tier. FN discontinued the 503; we didn’t.
Will an FN Reflex holster fit my 503?
No — the Reflex replaced the 503 in FN’s catalog but not in its dimensions; each gets its own dedicated shell. Select the 503 specifically in the builder.
Can I get a light on my FN 503?
No — the 503 has no accessory rail, so every 503 holster we build is a non-lightbearing configuration, which also keeps it in our fastest production tiers.
Can I get a left-handed FN 503 holster?
Yes — and unlike most micro fitments, left-handed 503 builds qualify for our fastest Quick Ship tier alongside right-handed ones. The builder shows your exact lead time.
What warranty comes with an FN 503 holster?
Every ANR Design holster includes a free Lifetime Warranty on the KYDEX® shell for the original purchaser — automatic on every order, no registration.