FN 509C MRD Compact 9mm 3.7″ | 66100572

The FN 509C MRD is a compact, optics-ready variant of the FN 509 platform designed for carry and everyday use. It features a 3.70″ cold hammer-forged barrel and a polymer frame with enhanced textures and interchangeable backstraps for fit customization. The slide is optic-ready with FN’s low-profile mounting system and ships with two magazines and a soft pistol case. For an optic under $1000 that pairs well with this platform, consider the Trijicon RMR Type 2 for a durable, low-profile red dot that co-witnesses effectively with the pistol’s iron sights.

Applications: concealed carry and precision practice/range training.

Product Specifications

• The UPC is 845737010898.
• The manufacturer is FN America / FN Herstal.
• The model and part number are FN 509C MRD / 66100572.
• The caliber is listed as 9mm.
• The barrel measures 3.70 inches and is cold hammer-forged.
• The barrel description is cold hammer-forged stainless steel with a recessed target crown.
• The slide is optic-ready and serrated with a black PVD finish.
• The frame is a polymer frame with a Picatinny accessory rail.
• The sights are all-black co-witness iron sights.
• The package includes two 10-round magazines.
• The pistol ships with two interchangeable backstraps, an owner’s manual, a locking device, and a soft pistol case.
• The firearm features FN’s low-profile optics mounting system compatible with many miniature red-dot optics.
• The operating controls include full ambidextrous controls (slide stop and magazine release).
• The finish is listed as matte black / black PVD.
• The overall length is 6.80 inches.

The FN 509C MRD condenses full-size performance into a compact, carry-oriented package while retaining the modularity expected from the FN 509 family. Its optic-ready slide and interchangeable backstraps make it adaptable to a wide range of shooters and carry setups, and the cold hammer-forged barrel supports consistent up-range performance for training and everyday carry use.