FN 509 Full-Size MRD 9mm 4.5″ Black PVD

The FN 509 Full-Size MRD is a full-size, optics-ready duty-style pistol built for reliable, everyday use. It is chambered in 9mm and features FN's Low-Profile Optics-Mounting System for direct-mounting of compatible red dot optics. The pistol pairs a full-size slide and frame with an enhanced grip texture and ambidextrous controls for ergonomic handling.

Key Specifications

• The pistol is chambered in 9mm.
• The action is double-action striker-fired.
• The barrel measures 4.5 inches and is cold hammer-forged from stainless steel.
• Finish is Black PVD.
• The frame is constructed of polymer.
• The unloaded weight is 27 oz..
• The overall length is 7.9 inches.
• The sight radius is 6.3 inches.
• The rifling twist rate is 1:10 RH.
• Includes FN Low-Profile Optics Mounting System with MRD plates and ships with two magazines and interchangeable backstraps.

The FN 509 Full-Size MRD combines a duty-sized platform with an optics-ready slide and a durable cold hammer-forged barrel, providing a stable, adaptable base for modern configurations. Its full-size ergonomics, ambidextrous controls and included mounting hardware make it suited for users who prioritize a reliable, configurable pistol for range, duty, or home use.