FN 509 MRD 9mm 4.5" FDE 10+1 66-100723

FN 509 MRD

The FN 509 MRD is a full-size, duty-grade 9mm pistol engineered for modularity, accuracy, and reliable performance in defensive and tactical applications. It features a 4.5 inch hammer-forged stainless steel barrel with a recessed target crown, an optics-cut slide with FN's proprietary mounting system, and suppressor-height co-witness iron sights. Finished in Flat Dark Earth with a matching polymer frame, this striker-fired pistol offers a 10+1 capacity and a clean double-action-only trigger pull between 4.5 and 6 pounds.

The optics-ready slide accepts most leading miniature red dot sights while the co-witness iron sights provide an immediate backup aiming solution. An integrated Picatinny rail supports lights or lasers, and interchangeable backstraps allow for a customized grip fit. Fully ambidextrous controls and the absence of a manual safety streamline operation for both right- and left-handed shooters, while the durable PVD slide finish and polymer frame deliver corrosion resistance and consistent handling.

This pistol is well suited for duty carry, home defense, and range training where optics readiness, full-size capacity, and proven FN reliability are essential. The combination of a precision barrel, modular optics system, and ergonomic full-size frame makes the 509 MRD a versatile platform for shooters seeking a high-performance 9mm handgun in Flat Dark Earth.

Specifications