Reliable handguns for personal defense and range work need to balance durability, ergonomics, and parts availability. The FN 509 checks those boxes with a service-proven design that translates well from duty use to civilian carry and training.

FN 509

Design & proven pedigree

The FN 509 was originally designed with military and law enforcement specifications in mind and even served as FN’s entry in the U.S. Army handgun trials. While it ultimately lost out to another platform, the FN 509 retains that high-standard development DNA. The package offered here includes a 15-round magazine and a 12-round magazine, plus the original box, manual, and a spare backstrap to tailor grip feel for different shooters.

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Features that matter for defense and range use

As a semi-auto in the defense category, the FN 509 emphasizes consistent trigger reset, robust slide and frame construction, and accessory compatibility. The included backstrap lets shooters fine-tune hand shape and trigger reach, improving follow-up shot speed and comfort during long range sessions or training. Dual magazine options—15- and 12-round—give flexibility for range capacity or restricted carry states without needing extra aftermarket changes.

Certified Used — value and confidence

This listing is a Certified Used Firearm: each gun is inspected and graded very good to excellent. Certified Used items come with a clear hallmark and a ‘no questions asked’ return policy, making a $549.99 price point an attractive entry for someone seeking a service-grade pistol without new-gun pricing. View product details and pricing to confirm serial-verified condition and included items.

Practical considerations for buyers

Fn as a manufacturer is known for duty-grade engineering and parts support, which matters when planning maintenance cycles or sourcing replacement magazines and backstraps. The FN 509’s controls and handling suit a broad range of users; swapping the included backstrap and training with both magazines helps build confidence under stress.

For those prioritizing a durable semi-auto with law-enforcement-grade origins and a certified used guarantee at a competitive $549.99 price, check current availability and buy directly from the shop page where the listing links to the retailer’s purchase flow. Check current availability

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