$49.99
4 in stock
Online inventory may differ from in-store availability.
NOTICE: This item is subject to shipping times of 10-12 days due to brand shipping logistics.
Orders are processed quickly so your item gets moving as soon as possible.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The FN 509 Compact is one of the better-engineered carry pistols on the market, and a factory magazine is one of those things you just don't want to cut corners on. This is the genuine FN America OEM 12-round magazine for the 509C, built to the exact same specs and tolerances as the mag that shipped with your gun. No guessing about fit, no feeding issues — it just works.
The body is steel with a flat black finish, and inside you've got a steel wire spring and a high-visibility polymer follower designed to minimize tilt and keep rounds feeding cleanly. Ambidextrous witness holes on both sides let you do a quick round count at a glance, which is a small but genuinely useful detail. The included pinky extension baseplate adds just enough grip length to get all four fingers solidly on the frame, making a real difference in control during shooting without adding much to the overall footprint when you're carrying.
The 12-rounder is the go-to choice for concealed carry with the 509C. With this mag in the gun, the grip is more compact than with the 15-rounder, which means less printing and a cleaner draw from concealment. A lot of 509C owners run the 12 in the gun and carry the 15-round mag as a reload — it's a smart setup. This is also a natural spare or replacement if you lose a mag, have one go out of rotation, or just want to build up your supply.
One thing worth knowing: this mag is designed specifically for the 509 Compact and will not work with the FNS or FNX series pistols. FN's magazine compatibility between their various pistol lines has caused confusion over the years, so it's worth being clear — if you have a 509C, this is the right one.
This magazine is designed for the FN 509 Compact (509C) only. The 509C uses a shorter grip frame, so this mag is sized specifically for that platform. It is not intended for the full-size 509 or the Midsize variants, though the 509C can accept the higher-capacity full-size 509 magazines when you need extra rounds.
No, and this is a common point of confusion with FN's lineup. The 509 magazine uses a different baseplate design than the FNS series, which prevents FNS mags from seating properly in the 509C. Stick with magazines made specifically for the 509 platform to ensure reliable fit and function.
The 12-round magazine sits more flush with the grip frame, making the 509C more concealable and easier to carry. The 15-round magazine extends below the grip and adds noticeable length, which some find more comfortable for range use or for shooters with larger hands. Many 509C owners carry the 12-round in the gun for concealment and keep the 15-round as a reload.
Factory magazines are made to the same specs and tolerances as the original equipment, which means you're getting a guaranteed fit right out of the box. Aftermarket options for the FN 509 platform are limited compared to more common pistols, so OEM is usually the smart and straightforward call for this gun.
The pinky extension adds a small amount of length to the bottom of the grip but doesn't significantly impact concealability for most people. It helps get your bottom finger solidly on the frame, which improves grip and control during shooting. It's a worthwhile tradeoff and is the standard baseplate included with this magazine.
| UPC | 845737010331 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 20-100375 |
| Brand Fit | FN |
| Caliber/Gauge | 9mm |
| Capacity | 12 |
| Length | 6.4 |
| Model | |
| Model Fit | 509 Compact |
| Package Height | 1.3 |
| Package Width | 2.6 |
| Product Type | Accessory-Magazines |
| Quantity | 1 |
| Shipping Weight | 0.2 |
You must be logged in to post a review.
Reviews
There are no reviews yet.