FN 509 MRD Full-Size 9mm FDE | FN 66100723

The FN 509 MRD is an optics-ready full-size 9mm pistol offered in a Flat Dark Earth finish with FN’s Low-Profile Optics Mounting System. It uses a striker-fired, semi-automatic operation and is supplied with mounting plates to accept a variety of popular pistol red dot optics. For an optic pairing under $1,000, the Trijicon RMR series is a common choice that mounts easily with the included adapter plates.

Applications for this handgun include duty/range use and competition/practice; its full-size frame and extended sight radius support controlled follow-up shots and consistent training. The package is configured to support optics installation and field use with included accessories.

Product Specifications

• The UPC is 845737011840.
• The manufacturer is FN America / FN Herstal.
• The model is 509 MRD.
• The caliber is listed as 9mm Luger.
• The operation is specified as double-action striker-fired.
• The frame material is polymer.
• The finish and frame color are listed as Flat Dark Earth.
• The product includes an optic footprint described as multiple to accept common red-dot plates.
• The handgun ships with two magazines and an FN soft case.
• The package includes four MRD mounting plates for optic compatibility.
• The barrel is described as cold hammer-forged stainless.
• The design includes a loaded chamber indicator.
• The sources describe interchangeable backstraps for adjustable grip fit.
• Additional listed features include a Low-Profile Mounting System and a polished chamber and feed ramp.

This FN 509 MRD presents a full-size platform built for optics integration and reliable semi-automatic function. The included mounting plates and two-magazine package make it a practical choice for those who plan to run a red-dot-equipped pistol for professional or competitive use. Its configuration emphasizes modularity and real-world handling rather than unnecessary extras.

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