FN 509 Tactical 9mm 4.5″ Threaded FDE Optic-Cut

Description

The FN 509 Tactical is an optics-ready variant of FN’s 509 platform engineered for accessory integration and suppressor compatibility. It features a 4.5-inch cold hammer-forged stainless-steel threaded barrel and a Flat Dark Earth optic-cut, serrated slide paired with an FDE polymer frame and accessory rail. FN’s Low-Profile Optics Mounting System accepts multiple MRD footprints and co-witnesses with suppressor-height night sights.

Key Specifications

• The caliber is 9mm.
• The barrel length is 4.5 inches.
• The action is Semi-Auto.
• The finish color is Flat Dark Earth.
• The frame material is Polymer.
• The optic footprint supports multiple MRD patterns.
• The threaded barrel uses an NFA thread pattern of 1/2×28.
• The weight is approximately 27.9 oz.
• The overall length is 7.9 inches.
• The sight type is Suppressor-height night sights.

Purpose-built for duty and precision-oriented shooters, the FN 509 Tactical combines a rugged threaded barrel and optics-ready slide with an ergonomically textured FDE polymer frame and ambidextrous controls. The Low-Profile Optics Mounting System and suppressor-height sights make the platform adaptable for optics and suppressor use, while the enhanced grip texture supports controlled follow-up shots. The 509 Tactical is a practical choice for those who need an optics-capable, service-style pistol finished in Flat Dark Earth.

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