FN 509 MRD Flat Dark Earth 9mm 4.5″ Barrel 10-Rounds w/ Holosun 407C

FN 509 MRD w/ Optic Features

The FN 509 MRD features a hammer-forged stainless steel barrel with a recessed target crown, providing increased protection and accuracy. The Flat Dark Earth PVD-coated slide includes aggressive front and rear serrations and is optic cut to accommodate the included Holosun HS 407C red dot, offering rapid target acquisition in any light conditions. Co-witness suppressor-height iron sights serve as reliable backups or complementary alignment aids.

Built on a full-size polymer frame with ambidextrous controls and interchangeable FDE polymer grips, the 509 MRD is designed for both left- and right-handed shooters. A Picatinny rail allows for weapon light or laser attachment, enhancing versatility. The double-action-only trigger offers a consistent pull between 4.5–6 lbs, while the low bore axis design enhances control and recoil mitigation.

FN 509 MRD w/ Optic Specifications

• Manufacturer: FN
• Model: 509
• Series: MRD w/ Optic
• Caliber: 9mm Luger
• Action: DAO (Double Action Only)
• Type: Semi-Auto Pistol
• Frame Size: Full Size
• Frame Finish: Flat Dark Earth
• Frame Material: Polymer
• Frame Description: Polymer Frame w/ Picatinny Rail
• Slide Finish: Flat Dark Earth PVD
• Slide Material: Steel
• Slide Description: Optic Cut / Serrated
• Optic: Holosun HS 407C Red Dot
• Sights: Co-Witness Iron Sights
• Sight Type: Suppressor Height
• Barrel Length: 4.50″
• Barrel Material: Hammer-Forged Stainless Steel
• Barrel Finish: Black
• Barrel Description: Recessed Target Crown
• Twist Rate: 1:10″ RH
• Muzzle: Recessed Target Crown
• Capacity: 10 + 1
• Max Capacity: 10
• Grips: Flat Dark Earth Polymer
• Trigger Pull Weight: 4.5 – 6 lbs
• Safety Features: No Manual Safety
• Overall Length: 7.90″
• Height: 5.56″
• Width: 1.35″
• Weight: 27 oz
• Hand: Ambidextrous