FN 509 MRD 9mm | Holosun 407C | 2x17rd | MPN 66101927

The FN 509 MRD is a striker-fired, optics-ready midsize 9mm pistol that ships with a Holosun 407C red dot, two 17-round magazines, and interchangeable backstraps. It uses a polymer frame and cold-hammer-forged steel components for a balance of durability and controllability. The factory-cut optics footprint and co-witness-capable sights make it suitable for shooters who want a pistol ready for an optic out of the box; the included Holosun 407C is a logical pairing for under $1,000 optics choices.

Product Specifications

• The UPC is 845737018344.
• The caliber is 9mm.
• The standard magazine capacity is 17 rounds.
• The pistol ships with two 17-round magazines.
• The action type is Semi-Auto.
• The frame material is Polymer.
• The grip material is Polymer.
• The finish and frame color are listed as Black.
• The listed weight is 26.9 oz.
• The optics included are a Holosun 407C red dot.
• The optic footprint supports multiple footprints for mounting plates.
• The pistol features fixed iron sights sized to co-witness with many micro red dots.
• The firearm is described as striker fired with no manual safety (non-manual safety).
• The controls are described as fully ambidextrous where applicable.
• The product ships with interchangeable backstraps for fit adjustment.

This FN 509 MRD bundle presents an optics-ready platform with a duty-style grip and a focus on practical accuracy and durability. Its combination of an optics-ready slide, included red dot, and high-capacity magazines make it well suited to range training and duty or professional use where an optics-equipped striker-fired pistol is desired. The package-level features emphasize readiness and ergonomic fit for a wide range of shooters.

Owners and reviewers commonly praise the platform’s ergonomics and the optics-ready design; many users note the convenience of the included Holosun 407C and the pistol’s comfortable grip ergonomics.