FN 509 Tactical 9mm 4.5″ Threaded Barrel Optic-Ready

About this product

The FN 509 Tactical is a full-size, service-oriented pistol from FN that pairs a threaded cold hammer-forged barrel with an optic-ready slide and suppressor-height night sights. It features FN’s Low-Profile Optics Mounting System to accept a range of miniature red-dot optics while preserving co-witness with the raised night sights. The pistol is built on a matte black polymer frame with interchangeable backstraps and an accessory rail for MIL-STD-1913 attachments. Designed for users who need an optic-ready platform with threaded-barrel capability, the 509 Tactical emphasizes reliability and modularity without compromise.

Key Specifications

• Caliber: 9mm.
• Barrel length: 4.50 inches.
• Action: Double Action Only.
• Capacity: 10+1.
• Weight: 27.90 oz.
• Frame: Matte black polymer frame with Picatinny rail.
• Slide: Optic-ready serrated stainless steel slide.
• Sights: Suppressor-height tritium night sights.
• Threading: 1/2×28 threaded barrel with O-ring thread cap.
• Optics mount: FN Low-Profile Optics Mounting System (patented).

With an optic-ready slide, robust threaded barrel and suppressor-height sights, the FN 509 Tactical is well-suited to range, duty, and suppressed-shooting applications where reliability and modularity matter. Its full-size ergonomics, interchangeable backstraps and mil-spec accessory rail give shooters a practical platform for a wide range of setups and mission profiles.

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