FN 509C MRD 9mm 3.7-inch FDE Optic-Ready Compact

The FN 509C MRD is a compact, optics-ready variant of the FN 509 platform designed for everyday carry and duty use. It is a striker-fired 9mm pistol featuring a 3.7-inch cold hammer-forged steel barrel and an optics mounting system that accepts most miniature red dot sights. The package includes two magazines and interchangeable backstraps to tailor grip ergonomics.

Key Specifications

• The caliber is 9mm for widespread ammunition availability.
• The barrel measures 3.7 inches and is cold hammer-forged with a recessed target crown.
• The standard capacity is 15+1 rounds, with an included 12-round magazine also supplied.
• The frame finish is Flat Dark Earth PVD on a polymer frame with a Picatinny accessory rail.
• The slide is optic-ready and serrated and ships with FN's Low-Profile Optics Mounting System.
• The pistol operates as a striker-fired / double-action-style autoloader with a flat face trigger.
• The weight is 25.5 oz (reported) for a balance of carry comfort and controllability.
• The overall length is 6.80 inches with a height of 5.20 inches and a width of 1.35 inches.
• Included in the box are one 12-round and one 15-round magazine, two backstraps, a locking device and a soft case.

Built around the proven FN 509 architecture, the 509C MRD delivers compact ergonomics, an optics-capable slide, and practical magazine options for concealed carry or professional use. Its combination of a durable cold hammer-forged barrel, ambidextrous controls, and modular grip options make it a reliable choice for users seeking a compact pistol that accepts miniature red dot sights and supports rapid, repeatable performance.