FN 509MT 9mm Luger 4.50" 15+1/24+1 Semi-Auto Pistol

The FN 509 Midsize Tactical (model 509MT) is a striker-fired 9mm Luger duty pistol built around a 4.50-inch cold hammer-forged stainless steel barrel with a recessed target crown, polished chamber, and polished feed ramp. The barrel is 1/2x28 threaded for suppressor mounting and ships with an O-ring retention thread cap.

The matte black steel slide is cut for the FN Low-Profile Optics Mounting System, making this pistol optic ready for most miniature red dots. Front and rear cocking serrations aid manipulation, and co-witnessing 3-Dot night sights are mounted at suppressor height so they remain visible behind a mounted red dot or with a suppressor installed. The matte black polymer frame is undercut at the trigger guard for a high grip, includes an integral Picatinny accessory rail, and uses interchangeable backstraps to fit a range of hand sizes. The 509MT is fully ambidextrous with mirrored slide stop and magazine release controls.

This package ships with two magazines: a flush-fit 15-round magazine for everyday carry and an extended 24-round magazine for higher round-count training sessions. The 509MT does not carry a manual external safety; the trigger group incorporates the passive safeties.

Designed and manufactured by FN America in the USA, the 509MT blends duty-grade durability with a threaded suppressor-ready barrel, an optics-cut slide, and a higher-capacity magazine option out of the box.

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