FN 509 MRD 9mm 4.5" Black 10+1 66-100718

FN 509 MRD

The FN 509 MRD is a full-size duty-style 9mm pistol equipped with FN's patented Low-Profile Optics Mounting System for shooters seeking a reliable platform for personal or home defense. It features a 4.5 inch cold hammer-forged barrel cut from proprietary machine gun-grade stainless steel with a recessed target crown to protect the rifling and maintain accuracy over the life of the pistol. The full-size slide and frame provide a secure grip and reduced recoil through added weight and length, while the all-black co-witness iron sights support seamless transition with a mounted red dot.

Aggressive slide serrations, an external extractor, and a loaded chamber indicator enhance manipulation and status checks. The polymer frame offers enhanced grip texture for faster follow-up shots, interchangeable backstraps for a customized fit, and a MIL-STD-1913 accessory rail for lights or lasers. Fully ambidextrous controls and a double-action striker-fired trigger with a 4.5 to 6 pound pull deliver consistent performance for both right- and left-handed shooters.

This pistol is well suited for duty, home defense, and range use where optics readiness, full-size handling, and proven FN reliability are required. The combination of a precision barrel, modular optics system, and durable black finish makes the 509 MRD a versatile choice for shooters who want a high-performance 9mm handgun ready for red dot mounting right out of the box.

Specifications