The FN 509F MRD-LE is a full-size, striker-fired 9mm duty pistol designed for law-enforcement use. Its 4.5-inch barrel, flat-faced duty-rated trigger, and conical striker support consistent shot placement, while the FN Low-Profile Optics-Mounting System provides a versatile platform for common duty-rated red-dot optics. Factory-installed 3-dot tritium night sights co-witness with a mounted MRD optic and provide a clear sight picture in changing light. The polymer frame and textured grip offer a secure, controllable hold during sustained use.

Key features

• FN Low-Profile Optics-Mounting System supports a wide range of common duty-rated optics
• 3-dot tritium night sights provide an illuminated sight picture day or night
• Flat-faced duty-rated trigger promotes a consistent trigger press
• Full-size 4.5-inch barrel balances duty handling with service-grade performance
• 17-round magazines provide substantial on-board ammunition capacity
• Polymer frame and textured grip support secure, controlled handling

The FN 509F MRD-LE combines a full-size duty layout, tritium sights, and adaptable optics mounting in a purpose-built service pistol.