FN 509 Full-Size MRD Handgun 9mm | 66100718

The FN 509 MRD is an optics-ready, full-size service-style pistol chambered in 9mm designed for professional and serious range use. It uses a low-profile optics mounting system with adapter plates to accept a range of popular red-dot footprints. The full-size frame and slide provide a longer sight radius and added mass for controllability during extended training or competitive courses of fire. For a cost-effective red-dot that pairs well and fits many common footprints, consider a Holosun 507C or a similarly spec’d optic under $1,000.

Product Specifications

• The pistol is chambered in 9mm.
• The action is striker-fired, semi-automatic.
• The frame is constructed of polymer.
• The finish is listed as matte black PVD.
• The optic footprint supports multiple red-dot plates via the FN low-profile mounting system.
• The pistol ships with two magazines.
• Magazine capacities are reported as 10 and 17 rounds depending on configuration.
• The listed overall length is 7.9 inches.
• The listed weight is 27 ounces.
• The pistol includes interchangeable backstraps for grip customization.
• The slide features aggressive serrations and an external extractor/loaded-chamber indicator.
• The UPC is 845737011802.

The FN 509 MRD is aimed at shooters who want a service-sized, optics-ready pistol with a familiar striker-fired interface and a polymer frame for manageable weight. Its low-profile optics system and multiple plate options make it a flexible platform for a wide range of red-dot choices, and the full-size ergonomics suit extended training sessions, duty-style carry by qualified professionals, or competitive shooting where a longer sight radius and controllability matter. The included magazines and backstrap options allow quick setup for individual preference and repeated range use.

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