The FN 509 Midsize Tactical is a striker-fired 9mm pistol built around a durable polymer frame and a 4.5-inch threaded barrel. Its FN Low-Profile Optics-Mounting System supports the installation of a compatible red dot, while suppressor-height 3-dot night sights provide a clear sight picture with or without a suppressor. Fully ambidextrous controls, interchangeable backstraps, and a duty-safe trigger make the pistol adaptable for a wide range of users. This configuration includes two 10-round magazines and a threaded muzzle cap.

Key features

• 4.5-inch threaded barrel with 1/2x28 muzzle threads for compatible suppressors and muzzle devices
• FN Low-Profile Optics-Mounting System provides an optics-ready platform
• Suppressor-height 3-dot night sights support rapid target acquisition in low light
• Striker-fired action with an integrated trigger safety and a 5.6-pound trigger pull
• Fully ambidextrous controls accommodate left- and right-handed shooters
• Polymer frame with interchangeable backstraps allows grip customization

The FN 509 Midsize Tactical combines optics-ready capability, suppressor-height night sights, and a threaded barrel in a versatile duty-size 9mm platform.