The FN 509M MRD delivers optic-ready versatility in a mid-size platform engineered for both duty and personal defense applications. This striker-fired pistol combines FN's military heritage with modern features that address real-world shooting demands.
What Makes This Different
The 509M MRD features a factory-milled slide cut compatible with popular red dot optics without requiring adapter plates for most models. The recessed crown barrel design protects the rifling while maintaining a compact profile. Unlike standard pistols that require aftermarket modifications, this model ships ready for optic mounting with co-witness iron sights included.
Key Features
- Optic-ready slide with direct mounting capability for red dot sights
- 4-inch cold hammer-forged barrel with recessed target crown
- 15+1 capacity with flush-fit magazines
- Ambidextrous slide stop and magazine release controls
- Picatinny rail for tactical light or laser attachment
- Low-profile, snag-free sights with tritium night sight compatibility
- Textured polymer grip with interchangeable backstraps
Field testing demonstrates consistent accuracy with various ammunition weights, while the striker-fired action provides a smooth 5.5-6.5 pound trigger pull. The stainless steel slide features front and rear serrations for positive manipulation in adverse conditions. Law enforcement agencies and competitive shooters report reliable function through extended round counts without cleaning intervals.
Technical Specs
- Caliber: 9mm Luger
- Barrel Length: 4.0 inches with recessed crown
- Overall Length: 7.4 inches
- Height: 5.5 inches
- Width: 1.35 inches
- Weight: 27 ounces (unloaded)
- Capacity: 15+1 rounds
- Frame: Matte black polymer with Picatinny rail
- Slide: Matte black stainless steel with optic cut
- Controls: Ambidextrous slide stop and magazine release
- Sights: Fixed 3-dot system
- Made in USA with FN limited lifetime warranty
The 509M MRD addresses the growing demand for optic-ready pistols without compromising reliability or ergonomics. Professional users and serious enthusiasts recognize the value of factory-engineered optic integration over aftermarket modifications.