The FN 509 MRD Full-Size is an optics-ready, duty-style pistol from FN designed for personal and home defense as well as service-oriented roles where reliability and modularity are priorities. It ships in Flat Dark Earth with a polymer frame and a low-profile optics mounting system that accepts multiple optic footprints. The design emphasizes a secure grip, robust slide geometry, and accessory compatibility for practical, real-world use.
Key Specifications
- Chambered for 9mm for common ammunition availability and practical performance.
- Configured as a striker-fired, semi-automatic pistol for consistent trigger operation.
- Built on a polymer frame finished in Flat Dark Earth for reduced weight and corrosion resistance.
- Includes a low-profile optics mounting system with plate adapters to accept most major pistol red-dot footprints.
- Includes two magazines as shipped contents.
- Ships with interchangeable backstraps to tailor grip fit to the user.
- The advertised weight is 26.9 oz to provide a reference for handling and carry considerations.
- The rifling rate is listed as a 1-in-10″ twist for bullet stabilization information.
- Optic footprint is listed as multiple to reflect compatibility with several mounting patterns.
The FN 509 MRD Full-Size combines a user-focused control layout and optics-ready platform in a practical package suited to responsible owners seeking a reliable full-size pistol. Its modular features — optics mounting, interchangeable backstraps, and included magazines — make it adaptable to a range of duty, defensive, and range applications while maintaining a straightforward, serviceable design.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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