The FN 509 Midsize Tactical is a Flat Dark Earth semi-automatic pistol chambered in 9mm. It combines a compact midsize frame with a 4.5-inch threaded barrel, suppressor-height night sights, and an optics-ready slide for flexible carry, training, and duty configurations. Its textured polymer grip provides a secure hold, while the striker-fired system uses an integrated trigger safety for consistent operation.

Key features

• 4.5-inch threaded barrel with a 1/2x28 thread pitch supports compatible muzzle devices
• Factory optics-ready slide accommodates a compatible pistol red dot sight
• Suppressor-height night sights provide an elevated sight picture and low-light visibility
• Textured polymer grip supports a secure, repeatable hold
• 10+1 capacity configuration includes two magazines
• Integrated trigger safety helps prevent unintentional discharge

The FN 509 Midsize Tactical delivers a versatile optics-ready and suppressor-compatible 9mm pistol configuration in Flat Dark Earth.