FN 509 Midsize MRD 9mm 4 in FDE Pistol

The FN 509 Midsize MRD is a 9mm striker-fired semi-automatic pistol with a 4-inch barrel and Flat Dark Earth finish. Its optics-ready slide, ambidextrous controls, interchangeable backstraps, and integrated accessory rail support practical configuration for concealed carry and general range use.

The polymer frame includes enhanced grip texturing, while the slide features front and rear cocking serrations, combat-style co-witness iron sights, and a recessed crown. The FN Low Profile Optics Mounting System is designed for direct mounting of compatible miniature red dot optics.

Key Specifications

• The pistol is chambered in 9mm.
• The barrel measures 4 inches.
• The frame is constructed from polymer.
• The finish and frame color are Flat Dark Earth.
• The pistol uses a double-action operating system.
• The design is striker-fired.
• The slide is optic ready with serrations.
• The pistol has ambidextrous controls.
• The sights are co-witness iron sights.
• The package includes two magazines.

With its mid-size format, optics-ready configuration, adaptable grip setup, and durable polymer construction, the FN 509 Midsize MRD provides a versatile platform for shooters who value straightforward controls and practical sighting options.

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