FN 509M MRD Midsize 9mm 4″ Optic-Ready Pistol

About this product

The FN 509M MRD is a midsize, optic-ready service pistol designed for everyday carry and practical range use. It features a 4″ cold hammer-forged stainless steel barrel and the FN Low Profile Optics Mounting System for direct mounting of many miniature red dot optics. The pistol uses a polymer frame with enhanced texturing and interchangeable backstraps for adjustable ergonomics, and it ships with two magazines and a soft case. Controls and ergonomics are configured to support fast, repeatable operation in a compact package.

Key Specifications

• The chambering is 9mm Luger.
• The barrel measures 4 inches.
• The overall length is 7.4 inches.
• The unloaded weight is approximately 26.9 oz.
• The frame material is polymer.
• The slide is optic-ready with serrations.
• Optic mounting uses the FN Low Profile Optics Mounting System.
• The firearm ships with 2 magazines.
• Sights are black co-witness iron sights.
• Includes interchangeable backstraps for a customizable grip fit.

With an optics-capable slide, a controllable midsize footprint, and user-focused ergonomics, the 509M MRD is suited for concealed carry and everyday range work where fast, reliable performance and a compact package are priorities.