The FN 509 Full Size pistol in FDE with a 4.5-inch barrel and 17-round capacity (brand part no. 66-100722) is a full-size, duty-grade striker-fired 9mm built for high-capacity performance. FN America cuts the slide for optic mounting and serrates it for a positive grip, and adjustable sights support precise target acquisition. This configuration ships without a manual safety for a clean, fast presentation, with two magazines included. Among full-size semi-auto handguns, this 509 configuration favors duty and home-defense use.

Key Specifications

• The chambering is 9mm.
• The capacity is 17 rounds.
• The barrel measures 4.5 inches, finished in FDE.
• The slide is optic cut and serrated, ready for a red dot.
• The sights are adjustable for precise aiming.
• The design has no manual safety, for a clean, fast presentation.
• Two magazines are included.
• Shipping weight of approximately 3.3 pounds.
• The action is semi-automatic, cycling a fresh round into the chamber with every trigger pull.

Frequently Asked Questions

Does this pistol have a manual safety? No, this configuration ships without a manual safety.

Is this pistol ready for a red dot optic? Yes, the slide is optic cut for a red dot mount.

Buy the FN 509 Full Size Pistol, FDE

Full-size, high-capacity 9mm performance in a duty-grade FDE finish is exactly what this 509 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.