FN 509 Tactical 9mm Full-Size, FDE, Optics-Ready, Threaded Barrel, 24+1
The FN 509 Tactical blends duty-ready reliability with modern enhancements, offering a factory-ready platform for suppressors and red-dot optics. This full-size 9mm arrives with a 4.5-inch threaded, cold-hammer-forged stainless barrel, suppressor-height tritium night sights, and FN’s patented Low-Profile Optics Mounting System that accepts more than 10 micro red-dot footprints. Finished in matching flat dark earth on both the slide and polymer frame, it delivers high capacity, ambidextrous controls, and proven lineage from FN’s Modular Handgun System submission.
Condition
Overall Condition: Good – Shows some signs of prior use and handling.
Bore Condition: Good – Clean, well-maintained, minor wear marks; rifling remains well-defined.
Specific Condition Notes: Numerous exterior scratches and blemishes are present, yet the pistol functions correctly and the bore is bright.
What’s Included
- FN-branded FDE soft zippered pistol case
- 1× 24-round FN factory steel magazine
- 1× 17-round FN factory steel magazine
- FN Low-Profile MRD mounting plate #1 (installed)
- FN Low-Profile MRD mounting plate #3 (loose)
- FN 509 Series owner's manual
The 4.5-inch barrel is threaded 1/2-28 UNEF and capped by an O-ring-retained thread protector, ready for common suppressors and compensators. A recessed target crown helps protect accuracy-critical surfaces.
FN’s Low-Profile Optics Mounting System seats the optic low enough to co-witness with the tall night sights, reducing profile and snag points. Two plates are provided to fit popular red-dot footprints right out of the box.
Ambidextrous slide-stop levers and magazine releases cater to both left- and right-handed shooters without aftermarket parts. The striker-fired action features a flat-faced trigger with an integrated safety blade for consistent, familiar operation.
The slide wears an FDE PVD finish with forward and rear cocking serrations, while the glass-filled polymer frame matches the color and adds molded accessory rails for lights or lasers. Factory magazines supply 24-round and 17-round capacities to suit duty, range, or concealed roles.