FN 509M MRD Midsize 9mm 4″ FDE 15+1

About this product

The FN 509M MRD is a midsize handgun configured for everyday carry and duty applications where a compact profile and optics readiness are priorities. It uses the FN Low Profile Optics Mounting System to allow direct mounting of compatible miniature red dot optics. The pistol features a 4-inch cold hammer-forged barrel and a Flat Dark Earth polymer frame with interchangeable backstraps for a customizable grip. Two 15-round magazines and a soft case are included for immediate use and secure storage.

Key Specifications

• The pistol is chambered in 9mm.
• The barrel measures 4 inches.
• Standard magazine capacity is 15+1 rounds and the package includes two 15-round magazines.
• The unloaded weight is approximately 26.5 oz.
• The overall length is 7.4 inches.
• The frame finish and color is Flat Dark Earth on a polymer frame.
• The barrel is cold hammer-forged stainless steel with a recessed target crown.
• Equipped with the FN Low Profile Optics Mounting System for direct-mount optic compatibility.
• Features fully ambidextrous controls for user flexibility.
• Ships with two magazines, an FN soft case, a locking device, and an owner’s manual.

Purpose-built for users who want a reliable, compact platform that accepts modern red-dot optics, the FN 509M MRD balances concealability and functional capacity. Its durable materials, optics-ready slide, and interchangeable ergonomics make it suitable for everyday carry, range use, and practical shooting where a dependable, compact pistol is required.

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