The FN 509 Tactical is a full size striker fired semi-automatic pistol chambered in 9x19, developed by FN Herstal as part of the 509 platform. It operates on a short recoil, locked breech system with a modified Browning cam-lock action. The Tactical variant is built around a 4.50 inch cold hammer forged, chrome-lined barrel with 1/2x28 threading for suppressor attachment. The slide is machined with FN's Low-Profile Optics Mounting System, which uses a series of adapter plates to accept a wide range of optic footprints. The pistol is fitted with suppressor-height co-witness sights to allow sight picture through both mounted optics and elevated suppressor-compatible sight lines. The frame incorporates an integrated accessory rail, textured grip panels, and interchangeable backstraps. The 509 Tactical uses FN's striker fired trigger system with a trigger safety blade and a firing pin block safety.

This example is the Grey variant, featuring a grey polymer frame paired with a grey PVD finished stainless steel slide. The factory trigger has been replaced with a red Apex trigger. Accompanied by four FN 24-round extended magazines, one FN 17-round magazine, five ProMag 17-round magazines (ten total), optics mounting plates, original box, and soft case.

Specifications

• Manufacturer: FN Herstal
• Model: 509 Tactical
• Caliber: 9x19
• Action: Striker fired, short recoil
• Barrel Length: 4.50 inches, threaded (1/2x28)
• Barrel: Cold hammer forged, chrome-lined
• Frame: Grey polymer
• Slide: Stainless steel, grey PVD finish
• Trigger: Red Apex
• Sights: Suppressor-height co-witness sights
• Safety: Trigger safety, firing pin block
• Optics System: FN Low-Profile Optics Mounting System with plates
• Magazines: Four FN 24-round, one FN 17-round, five ProMag 17-round