FN 509 Midsize Tactical 9mm | 4.5″ Threaded | 66100838

The FN 509 Midsize Tactical is an optics-ready, suppressor-ready mid-size striker-fired pistol built for versatile real-world use. It features a 4.5-inch threaded barrel, suppressor-height 3-dot night sights, and an FN low-profile optics mounting system. The pistol ships with two magazines and a soft case and is finished in matte black/PVD on a polymer frame. Consider pairing this pistol with a Trijicon RMR or similar red dot (priced well under $1,000) for fast target acquisition and durable service use.

Applications: duty-style carry and precision range training are two common use cases where the Midsize Tactical’s balance and sighting options are advantageous.

Product Specifications

• The manufacturer is FN America / FN Herstal.
• The model is FN 509 Midsize Tactical.
• The UPC is 845737015176.
• The caliber is 9mm.
• The action is Semi-Auto.
• The barrel length is 4.5 inches.
• The barrel type is Threaded.
• The NFA thread pattern is 1/2×28.
• The optic footprint is listed as Multiple.
• The sights are Suppressor-Height 3-Dot Night Sights.
• The frame material is Polymer.
• The grip material is Polymer.
• The number of magazines included is 2.
• The magazine capacity is 10 rounds per magazine.
• The slide is described as Optic Ready / Serrated.

The FN 509 Midsize Tactical is configured to give a balance of shootability and concealability while retaining features useful for professional and recreational shooters alike. Its optic-ready slide, threaded barrel, and suppressor-height sights make it a flexible platform for users who want to outfit a pistol for accurate range work and duty-style carry. The included magazines and FN soft case add immediate utility out of the box.

Owners and users frequently note the pistol’s balanced proportions that aid rapid sight acquisition and improved handling, and many report the trigger provides a smooth break around the advertised ~5 lb range.

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