FN America / FN Herstal FN509M 9mm

The FN 509M is a midsize tactical 9mm pistol built for practical duty, range training, and everyday carry. It arrives optics-ready and with a threaded barrel to accommodate suppressor-ready setups where legal.

The pistol pairs a polymer frame with a black PVD-finished slide and a 4.5 inch threaded barrel for enhanced versatility. The ergonomics include interchangeable backstraps and enhanced grip texture for consistent control, and the package ships with multiple magazines for extended training sessions.

Key Specifications

• The caliber is 9mm.
• The action is Semi-Auto.
• The barrel length is 4.5 inches.
• The overall length is 7.9 inches.
• The weight is 27.9 oz.
• The frame material is Polymer.
• The firearm includes one 15-round and four 24-round magazines.
• The sights are Night sights.
• The finish is Black PVD.
• The optic footprint is Multiple (optics ready).

This firearm is not available for sale in California, Illinois, and Oregon. It cannot be direct shipped to Washington and Rhode Island.

The FN 509M 9mm delivers tactical-grade features in a midsize package and is ready for optics and threaded-barrel configurations. Buy the FN America / FN Herstal FN509M 9mm online today to secure a versatile, optics-ready pistol for range, duty, or everyday carry.