FN 509M 9mm 4.5in FDE Tactical

The FN 509M is a midsize tactical pistol built for professional and civilian applications, including duty, range training, and home defense. It combines a full-featured grip profile with optics-ready ergonomics and a threaded barrel for modular accessories.

Constructed on a polymer frame with an applied finish in Flat Dark Earth, the pistol offers a balanced feel and controls designed for rapid sight acquisition. The slide accepts multiple optic footprints and ships with suppressor-height night sights to support co-witnessed red dot setups.

Key Specifications

• The caliber is 9mm.
• The barrel length is 4.5 inches.
• The action is Semi-Auto.
• The magazine capacity is 24 rounds.
• The package includes five magazines (four 24-round and one 15-round).
• The barrel is threaded with a 1/2x28 NFA thread pattern.
• The frame material is polymer.
• The finish color is Flat Dark Earth with a PVD applied finish.
• The optic footprint is multiple (FN Low-Profile Optics-Mounting System, optics-ready).
• The sights are suppressor-height night sights.

State Restrictions: This firearm is not available for sale in California or Oregon. Sale restrictions apply in Illinois (PICA). It cannot be directly shipped to Washington or Rhode Island.

With optics compatibility, a threaded barrel, and a multi-magazine bundle, the FN 509M presents a versatile midsize option for shooters seeking modularity and capacity. Buy the FN America / FN Herstal FN509M 9mm online today if this configuration meets your requirements.