The FN 509M Tactical in 9mm and flat dark earth is a mid-size, optic-ready striker-fired pistol that ships with one 15-round and one 24-round magazine (FN part no. 66-100745). FN America fits it with a cold hammer-forged stainless barrel threaded 1/2×28, suppressor-height 3-dot night sights and the FN Low-Profile Optics-Mounting System for adding a red dot. Fully ambidextrous controls and interchangeable backstraps let it fit right- and left-handed shooters. The PVD-finished slide and the MIL-STD-1913 rail round out a pistol made for duty, home defense and concealed carry. This FDE configuration gives you both a full-hand 15-round grip and a 24-round option for range days.

Key Specifications

• The chambering is 9mm, a widely available round with manageable recoil.
• The barrel is 4.5 inches of cold hammer-forged stainless steel with a recessed target crown for accuracy.
• The barrel is threaded 1/2×28 and ships with an O-ring retention thread cap, ready for a compatible suppressor.
• The pistol includes one 15-round and one 24-round magazine, covering carry and training use.
• The sights are suppressor-height 3-dot night sights, which stay visible when a suppressor is mounted.
• The FN Low-Profile Optics-Mounting System lets most mini red dots be added in minutes.
• The controls are fully ambidextrous, including the slide stop lever and magazine release.
• The slide has a long-wearing PVD finish in flat dark earth, which resists wear and glare.
• The frame has a MIL-STD-1913 rail for a weapon light or laser.
• The trigger is a duty-safe striker trigger with about a 5.6-pound pull, which gives a consistent press.

Frequently Asked Questions

Which magazines come with this FN 509M Tactical? One 15-round and one 24-round magazine, plus two interchangeable backstraps, an owner’s manual, a locking device and an FN soft pistol case.

Is the barrel threaded for a suppressor? Yes. The 4.5-inch barrel is threaded 1/2×28 with an O-ring retention thread cap, and the sights are suppressor height.

How do I mount a red dot? The slide uses the FN Low-Profile Optics-Mounting System, which accepts most mini red dot sights in minutes.

Buy the FN 509M Tactical Pistol, 9mm, FDE, 15/24-Round

This FDE 509M Tactical packs duty-grade features, night sights and an optic-ready slide into a mid-size frame. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more semi-auto handguns while you are here.