FN 509 Compact Tactical FDE | 9mm | 4.32″ | FN 66100781

The FN 509 Compact Tactical is a compact, optics-ready 9mm pistol configured for modern accessory use and concealed carry. It features a low-profile optics mounting system and a threaded cold hammer-forged barrel for compatibility with common muzzle devices and suppressor-height sights. The pistol’s Flat Dark Earth finish and textured polymer frame provide a durable, purposeful package suited for everyday carry and range training. A Trijicon RMR Type 2 pairs well with the FN Low-Profile Optics Mounting System and remains a sub-$1,000 option for users seeking a rugged miniature red-dot optic.

Product Specifications

• The UPC is 845737012137.
• The manufacturer is listed as FN America / FN Herstal.
• The model series is Compact Tactical.
• The caliber is 9mm.
• The barrel measures 4.32 inches and is described as threaded.
• The overall length is listed as 7.40 inches.
• The capacity is listed as 10 + 1.
• The frame material is listed as Polymer.
• The frame finish is Flat Dark Earth.
• The slide is described as Optic Cut/Serrated.
• The sighting system is listed as 3-Dot Night / Suppressor Height.
• The pistol uses an FN Low Profile Optics Mounting System for miniature red-dot optics.
• The accessory rail is a MIL-STD-1913 (Picatinny) mounting rail.
• The barrel thread pattern is 1/2 x 28.

The FN 509 Compact Tactical presents an optics-ready compact platform with a threaded barrel and suppressor-height sights, aimed at shooters who want a smaller, modern 9mm with accessory compatibility. The combination of an optics cut, threaded barrel and a flat dark earth frame make it a practical choice for concealed carry and dedicated range practice where modularity and sight options are priorities.