FN 509M MRD Midsize 9mm 15+1 4-inch Optic-Ready

About this product

The FN 509M MRD is a midsize, optic-ready 9mm pistol built for everyday carry and practical field use. It pairs a 4-inch cold hammer-forged stainless barrel with a midsize polymer frame and a MIL-STD-1913 accessory rail. The pistol ships with FN’s Low Profile Optics Mounting System and two magazines, giving a ready-to-configure platform for modern carry and duty applications.

Key Specifications

• Caliber: 9mm.
• Capacity: 15+1 standard configuration.
• Barrel Length: 4 inches with a recessed crown.
• Barrel Description: Cold hammer-forged stainless steel.
• Frame Material: Polymer with Picatinny rail.
• Weight: 26.5 oz.
• Overall Length: 7.4 inches.
• Sights: Black co-witness iron sights.
• Includes: Two magazines and FN Optics Mounting System.
• Rate of Twist: 1:10 RH.

Thoughtfully configured for users who prioritize reliable everyday carry performance, the FN 509M MRD combines a hardened, cold hammer-forged barrel and optics-ready slide with an ergonomic midsize frame. Interchangeable backstraps, improved grip texturing and aggressive slide serrations make manipulation straightforward in daily-use scenarios, while the included optic mounting system and magazines provide immediate flexibility for setup. The 509M MRD is a balanced option for shooters seeking a compact platform that supports modern sighting solutions without sacrificing capacity or utility.

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