FN 509 Midsize Tactical 9mm FDE 4.5″

Description

The FN 509 Midsize Tactical is a compact, duty-capable pistol designed for multi-role use including concealed carry, home defense, and duty applications. It is optics-ready and configured for suppressor use with a threaded 4.5-inch barrel and suppressor-height sights. Controls and ergonomics are engineered for fast sight acquisition and repeatable handling in dynamic environments.

Key Specifications

• The caliber is 9mm Luger.
• The barrel measures 4.5 inches and uses a 1/2×28 thread pattern for muzzle devices.
• The action is Semi-Auto.
• The frame is Flat Dark Earth polymer and includes a MIL-STD-1913 accessory rail.
• Sights are Suppressor-height 3-dot night sights.
• Optics-ready with the FN Low-Profile Optics-Mounting System (multiple footprints).
• The slide has a Flat Dark Earth PVD finish with serrations for positive manipulation.
• Equipped with a threaded stainless steel barrel and fully ambidextrous controls.
• Weight is listed as 26.5 ounces in the provided attributes (see notes for discrepancy).

The FN 509 Midsize Tactical blends practical size with duty-level features: optics compatibility, suppressor‑height sights, a threaded cold hammer‑forged barrel, and an ergonomically textured polymer frame. Its configuration supports a range of training and operational uses while remaining compact enough for carry. The pistol’s feature set is aimed at shooters who want a modern, adaptable platform with proven FN design elements.

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