FN 509T Tactical 9mm 4.5in Threaded Barrel FDE

The FN 509T Tactical is a duty-oriented variant built on FN's proven 509 platform. It pairs a cold hammer-forged stainless-steel 4.50-inch threaded barrel with an optic-cut, serrated stainless slide and a Flat Dark Earth polymer frame with an accessory rail. Controls are fully ambidextrous and the pistol is configured to work with suppressor-height sights and miniature red dot optics.

Key Specifications

• The caliber is 9mm.
• The barrel measures 4.50 inches and is threaded.
• The thread pattern is 1/2x28.
• The slide is stainless steel, optic-cut and serrated.
• The frame is Flat Dark Earth polymer and includes a MIL-STD-1913/Picatinny accessory rail.
• The action is double-action-only (striker-fired).
• The sights are suppressor-height 3-dot night sights.
• The pistol features the FN Low-Profile Optics Mounting System for MRD compatibility.
• The rifling twist rate is 1:10.
• The overall length is 7.90 inches.

Purpose-built for shooters who prioritize adaptation and reliability, the FN 509T delivers a platform ready for optics and suppressor use without permanent slide modifications. Its threaded cold hammer-forged barrel, optics-ready slide, and suppressor-height sights make it a practical choice for demanding duty, range, or home applications where modularity and robust controls matter.