The FN Magazine Kit for FN 509 9mm Luger pistols gives you factory-original magazine capacity and reliability when you need it most. Whether you're building a defensive loadout, running competition stages, or maintaining duty-ready spares, these genuine FN magazines are engineered to the same exacting standards as your pistol. Unlike aftermarket alternatives, factory mags eliminate guesswork about feed reliability and durability—they're designed by the engineers who built your gun.

Each magazine features a stainless steel body with a corrosion-resistant finish and a polished interior that supports smooth round stacking and reliable feeding. The matte black exterior resists glare and mirrors the aesthetics of your FN 509. Witness holes numbered 4 through 17 let you confirm your round count at a glance without removing the magazine. The bright orange anti-tilt follower stays visible during loading and helps prevent binding, while the matte black polymer base pad absorbs impact if you eject a mag onto hard ground—practical durability for pistols that see real use.

This kit's 24-round total capacity (you'll receive multiple magazines) makes it ideal for shooters who want versatility: rotate fresh mags on the range, keep spares in a competition bag, or stack them in your duty rig. The high-visibility orange follower is especially useful in low light or fast-paced shooting scenarios where you need to know your gun's ready state instantly.

Compatibility note: These magazines are engineered exclusively for FN 509 pistols in 9mm Luger and will not function in FNS or FNX platform pistols. If you own an FN 509, these are the magazines FN recommends—no compromises, no surprises.

Key Features

• Factory-original FN engineering and quality control
• Stainless steel body with corrosion-resistant, polished interior
• Numbered witness holes (4–17) for quick round-count confirmation
• High-visibility orange anti-tilt follower prevents binding and jams
• Matte black polymer base pad protects magazine from impact damage
• 24-round total kit capacity across multiple magazines
• FN 509 9mm Luger exclusive—no cross-platform fitment

Specifications

Firearm Compatibility	FN 509 9mm Luger
Capacity	24 rounds (kit total)
Material (Body)	Stainless steel
Exterior Finish	Matte black
Follower Material	Bright orange polymer
Base Pad	Matte black polymer
Witness Holes	Numbered 4–17
Manufacturer	FN America

Frequently Asked Questions

Will these magazines work in my FNS or FNX pistol?

No. These magazines are engineered exclusively for the FN 509 platform. They will not function in FNS or FNX pistols. Always verify your firearm model before purchasing magazines.

What does the 24-round kit capacity mean?

The kit provides multiple magazines that total 24 rounds of capacity. You'll receive more than one magazine; the exact number depends on the individual magazine round count.

Why are the witness holes numbered only up to 17 when the kit is 24 rounds total?

The numbered witness holes (4–17) indicate the round count within a single magazine. The 24-round total refers to the combined capacity of all magazines included in the kit.

Are these magazines suitable for duty and carry use?

Yes. These are factory-original FN magazines built to the same reliability standards as your FN 509 pistol. The corrosion-resistant stainless construction and durable polymer base pad make them suitable for defensive carry, duty, competition, and training use.