FN 509 Compact Tactical FDE 9mm 4.32″ Threaded

The FN 509 Compact Tactical is a compact, optics-ready 9mm pistol designed for modern duty and everyday carry applications. It features the FN Low-Profile Optics Mounting System for numerous miniature red dot optics and a cold hammer-forged threaded barrel compatible with common 1/2×28 accessories. The pistol has suppressor-height night sights and an FDE polymer frame with an accessory rail and interchangeable backstraps.

Key Specifications

• The caliber is 9mm Luger.
• The barrel measures 4.32 inches and is cold hammer-forged.
• The thread pattern is 1/2×28 for common muzzle accessories.
• The standard capacity is listed as 10+1.
• The frame finish and color is Flat Dark Earth.
• The frame material is Polymer with an integrated Picatinny rail.
• The pistol is optics-ready via the FN Low-Profile Optics Mounting System.
• The slide is described as optic cut and serrated.
• The sights are 3-dot night and include suppressor-height front/rear geometry.
• The overall length is 7.40 inches.

The FN 509 Compact Tactical brings a blend of compact ergonomics and tactical features—optics readiness, a threaded cold hammer-forged barrel, and suppressor-height night sights—into a Flat Dark Earth polymer package. Its configuration is suited for users who value a compact platform that accepts modern red-dot optics and common muzzle devices while retaining practical handling for duty or everyday carry roles.