FN 509 Compact Tactical 9mm — 4.32″ Threaded Barrel

The FN 509 Compact Tactical is an optics-ready compact 9mm pistol designed for modularity and accessory compatibility. It features a cold hammer-forged, threaded barrel and FN's Low-Profile Optics Mounting System for miniature red-dot sights. The pistol pairs a serrated, optic-cut slide with a black polymer frame that includes a MIL-STD-1913 accessory rail.

Key Specifications

• The caliber is 9mm Luger.
• The barrel measures 4.32 inches and is cold hammer-forged and threaded.
• The thread pattern is 1/2 x 28.
• The optics interface is the FN Low-Profile Optics Mounting System compatible with many miniature red-dot sights.
• The sights are suppressor-height 3-dot night sights.
• The frame is black polymer with a Picatinny (MIL-STD-1913) rail for accessories.
• The slide is optic-cut and serrated and includes a loaded chamber indicator.
• The grip offers interchangeable backstraps for hand-fit adjustment.
• Operating controls include a fully ambidextrous slide stop lever and magazine release.
• Includes magazines and interchangeable backstraps and ships with an FN soft case in many configurations.

Configured for compact carry and practical range use, the FN 509 Compact Tactical combines an optics-ready slide, threaded barrel, and ambidextrous controls in a compact package. Its modular interface and accessory compatibility make it suitable for users who require a versatile pistol that adapts to sighting and muzzle-device preferences while retaining a manageable footprint.