Description
FN America doesn't cut corners with their factory magazines, and this 10-round Reflex XL mag is a good example of that. The body is constructed from stainless steel for durability that holds up over time, and the black finish keeps things clean and corrosion resistant. Inside, you've got a high-tensile steel spring and an anti-tilt polymer follower working together to keep rounds feeding smoothly and consistently, shot after shot.
One feature that doesn't always get enough credit is the numbered, rear-facing witness holes. It sounds like a small thing, but being able to glance at your mag and get a quick read on remaining rounds without doing a full inspection is genuinely useful, whether you're at the range or running drills.
Because this is a genuine OEM magazine from FN America, you're getting the exact same tolerances and specs as the magazine that came with your pistol. No fitting issues, no guesswork. It drops free cleanly, seats positively, and the feed lips are built to FN's standards so you're not rolling the dice on reliability the way you might with an aftermarket option.
The Reflex XL is built around a slim, concealment-friendly profile, and this magazine fits right in with that design. At 10 rounds of 9mm Luger, it's a natural fit for anyone running the XL as an everyday carry pistol who wants a spare on hand, or for anyone who just wants a dedicated range mag to rotate through while keeping their carry mag fresh.
Key Specifications
- Manufacturer: FN America / FN Herstal
- Manufacturer Part Number (MPN): 20-100908
- UPC: 845737018993
- Caliber: 9mm Luger (9×19)
- Capacity: 10 Rounds
- Body Material: Stainless Steel
- Finish: Black
- Follower: Anti-Tilt Polymer
- Spring: High-Tensile Steel
- Witness Holes: Numbered, Rear-Facing
- Compatible Pistol: FN Reflex XL
- Overall Length: 6.40 in
- Width: 1.40 in
- Magazine Type: Factory OEM
What’s Included
- 1x FN Reflex XL 9mm 10-Round Magazine (Black)
Frequently Asked Questions
Will this magazine fit the standard FN Reflex, or only the Reflex XL?
This magazine is specifically designed for the FN Reflex XL pistol and may not be compatible with the original, shorter-grip FN Reflex. The Reflex and Reflex XL have different grip lengths and magazine well dimensions due to the XL's extended grip frame. Always confirm compatibility with your specific pistol model before ordering.
Is this a factory FN magazine or an aftermarket product?
This is a genuine OEM magazine manufactured by FN America to the same specifications as the magazine that ships with the Reflex XL pistol. That means the fit, feed lip geometry, and spring tension are all built to FN's own tolerances, not reverse-engineered by a third party. If reliability matters to you, staying with factory magazines is the right call.
What do the numbered witness holes on the back of the magazine do?
The rear-facing witness holes are numbered so you can see at a glance roughly how many rounds remain in the magazine without dropping it or counting rounds. It's a simple but practical feature, especially when you're moving quickly at the range or doing any kind of timed drill.
What ammo will this magazine feed reliably?
This magazine is chambered for 9mm Luger (also labeled 9×19 or 9mm Parabellum), which covers the vast majority of standard 9mm ammunition on the market. The anti-tilt polymer follower and high-tensile steel spring are designed to feed reliably across a wide range of loads, from standard 115gr FMJ range ammo to quality hollow point defensive rounds.
How does the 10-round Reflex XL magazine compare to the other capacity options?
FN offers the Reflex XL in 10, 15, and 18-round configurations. The 10-round version is the most compact option and works well as a spare or backup mag. The 15-round mag is the standard flush-fit option that ships with the pistol, and the 18-rounder extends slightly past the grip for added capacity. Pick based on your use case.
Can I use this magazine for everyday carry?
Yes. Being a factory FN America magazine, it's built to the same reliability standards as anything else FN ships with their pistols. The steel construction and anti-tilt follower make it a dependable choice for both range use and carry. Many Reflex XL owners keep a 10-rounder as a backup or spare while running higher-capacity mags as their primary.






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