FN 509 9mm Striker-Fired Pistol FDE Threaded Barrel Optics Ready - Used

The FN 509 is a full-size, duty-grade 9mm pistol built for shooters who want serious performance from a striker-fired platform. This example wears a flat dark earth finish and has a threaded barrel with a knurled thread protector. That makes it ready for muzzle devices, where legal. The slide is marked 9x19, and the aggressive slide serrations and aggressive grip texturing give a confident hold in any conditions.

The slide is cut for a mini red dot, so you can run an optic without sending the slide out for milling. The photos show a compact red dot already mounted, along with a second optic plate. The FN 509 also has ambidextrous controls and a well-shaped, textured grip. Together these make it comfortable and fast for range sessions, training classes, home defense, and competition.

This pistol suits shooters who want a proven, optics-ready 9mm platform with a threaded barrel in a durable FDE finish. It is a good fit for anyone moving up from a compact pistol or adding a capable full-size to their lineup.

Condition: Used. The photos show a mostly even FDE finish with light handling wear and a few small marks on the frame and slide. The black controls and threaded barrel look clean, and no rust or heavy scratches are visible. A red dot sight is mounted on the slide in the photos. Please review all photos carefully.