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The FN 509 platform has a well-earned reputation for reliability, and the magazines are no different. This 24-round magazine kit is a factory original from FN America, which means the fit, feed geometry, and tolerances are exactly what the pistol was designed around. No guessing, no fitting, no aftermarket compromises.
The body is heat-treated stainless steel with a corrosion-resistant black finish that holds up well over time and through regular use. Inside, a steel wire spring and anti-tilt polymer follower keep rounds feeding consistently, round after round. Numbered witness holes run along the body so you can check your round count at a glance without having to drop the mag.
What makes this a "kit" rather than just a magazine is the three included polymer grip extension sleeves, sized for the Compact, Midsize, and Fullsize 509 frames. The sleeves wrap around the exposed portion of the magazine body and blend into the grip of the pistol for a clean, snag-free profile. Without the correct sleeve installed, there will be a visible gap between the mag baseplate and the grip, so choosing the right one for your specific 509 model makes a real difference in how it carries and handles. The floor plate is removable for field stripping and cleaning, which is exactly what you want in a magazine you plan to run hard.
This is the same 24-round magazine included with the FN 509 Tactical from the factory. Whether you're picking up a backup mag for the range, stocking a few extras for competition, or just want the peace of mind that comes with a full-capacity OEM spare, this kit covers all three 509 frame sizes in one package.
Yes, it will feed and function in the 509 Compact, but there will be a gap between the magazine body and the bottom of the grip frame without a sleeve installed. That's why this kit includes the Compact-specific extension sleeve, which wraps around the exposed magazine body and gives it a finished, flush look while extending the grip surface.
Yes. This is the factory OEM 24-round magazine that FN ships with the 509 Tactical. It's built to the same specs and tolerances, so you're getting identical function and fit to the mags that came in the box with that pistol.
You'll want to use the sleeve that matches your specific 509 frame size. The Compact, Midsize, and Fullsize sleeves have different profiles designed to integrate with each respective grip. Installing the wrong sleeve won't damage anything, but it won't sit correctly against your pistol's frame.
The magazine body has numbered witness holes along the side so you can visually check your round count without dropping the mag. The high-visibility follower is also easy to spot through the holes when the magazine is empty.
Yes. The floor plate is removable, which lets you fully disassemble the magazine for cleaning and inspection. It's the same design FN uses across their factory 509 magazines and comes apart with a standard magazine disassembly procedure.
This is a factory original magazine manufactured by FN America, not an aftermarket product. It's made to FN's own specifications and tolerances, which is why it fits and feeds the way it does. If you want the same reliability you'd expect from the pistol itself, sticking with factory OEM magazines is the right call.
| UPC | 845737011666 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 20-100423 |
| Caliber/Gauge | 9mm |
| Capacity | 24 |
| Color | Black |
| Length | 9 |
| Model | |
| Package Height | 1.5 |
| Package Width | 2.8 |
| Product Type | Magazine |
| Quantity | 1 |
| Shipping Weight | 0.4 |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Style | Detachable |
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