The FN 509M Midsize Tactical is a multi-role pistol package designed for everyday carry, home defense and duty use. It features an optics-ready slide and a 4.5″ threaded barrel, and ships with multiple magazines to support both training and operational use. The package combines a mid-size grip frame with options for higher capacity magazines for extended sessions at the range.
Key Specifications
- Chambered in 9mm for common defensive and training ammunition availability.
- Barrel measures 4.5 inches and is threaded with a 1/2×28 pattern.
- Includes one 15-round and four 24-round magazines for varied capacity options.
- The highest magazine capacity supplied with the pistol is 24 rounds.
- Frame material is polymer with a Flat Dark Earth finish.
- Finish color is listed as Flat Dark Earth (FDE).
- Optics interface uses multiple footprints via the FN Low-Profile Optics-Mounting System.
- Overall length is listed as 7.9 inches.
- Sights are supplied as night sights (suppressor-height in some product text).
- Package includes an FN soft case and two interchangeable backstraps.
The FN 509M Midsize Tactical bundle pairs user-focused ergonomics with factory thread and optics readiness, supplied with multiple magazines for flexible use. Its mid-size footprint and modular optics platform make it suitable for duty, home defense, and range work where reliability and adaptable capacity are priorities.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
