FN 509 Tactical 9mm FDE 4.5″ Threaded Barrel, 17 & 24rd

The FN 509 Tactical is a full-size 9mm Luger semi-automatic pistol configured for optics and suppressor compatibility. It features FN’s Low-Profile Optics Mounting System and a cold hammer-forged, threaded 4.5" stainless steel barrel with a target crown. The pistol is finished in Flat Dark Earth and is supplied with suppressor-height night sights and high-capacity magazines.

Key Specifications

• The caliber is 9mm Luger.
• The barrel length is 4.5 inches with 1/2 x 28" thread pattern.
• The action is Semi-Auto.
• The frame material is Polymer with a Flat Dark Earth finish.
• The pistol uses FN’s Low-Profile Optics Mounting System (multiple MRD footprints supported).
• The sights are suppressor-height night sights for co-witnessing with red-dot optics.
• The overall length is 7.9 inches.
• The unloaded weight is 27.9 ounces.
• The maximum magazine capacity listed is 24 rounds; the package lists included magazines.
• The pistol ships with interchangeable backstraps and an FN soft case.

Purpose-built for optics and suppressor use, the FN 509 Tactical balances durability and modularity for range, duty, or competition. Its optics-ready slide, robust threaded barrel, and suppressor-height sights provide a practical platform for users who value a modern, adaptable pistol architecture.