FN 509 Tactical 9mm 4.5 in Threaded Optic-Ready Pistol

The FN 509 Tactical is a 9mm striker-fired pistol with a 4.5-inch cold hammer-forged stainless-steel threaded barrel and a black polymer frame. Its low-profile optics mounting system is designed for miniature red dot optics, while suppressor-height night sights provide an integrated sighting option.

The pistol features a serrated optic-ready slide, Picatinny accessory rail, interchangeable backstraps, and ambidextrous slide stop and magazine release controls. The threaded barrel uses a 1/2 x 28 thread pattern and includes a thread cap with an integrated O-ring.

Key Specifications

• The pistol is chambered in 9mm for compatibility with 9mm Luger ammunition.
• The magazine configuration is listed as 10+1 rounds.
• The barrel measures 4.5 inches and has a 1/2 x 28 threaded muzzle.
• The barrel is made from cold hammer-forged stainless steel.
• The overall length is listed as 7.9 inches.
• The unloaded weight is listed as 27.9 ounces.
• The slide includes an FN Low Profile Optics Mounting System for compatible miniature red dot optics.
• The pistol uses 3-dot suppressor-height night sights.
• The frame is constructed from black polymer and includes a Picatinny accessory rail.
• The rifling has a 1:10 right-hand twist.

With its threaded stainless-steel barrel, optics-ready slide, night sights, and adaptable grip configuration, the FN 509 Tactical provides a versatile platform for range practice, training, and other lawful sporting applications.

Related Videos: