FN 509T 9mm 4.50″ Threaded 10+1 5-Mag Bundle

The FN 509T is a duty-proven, full-size 9mm pistol built for high-round-count use and optics-forward setups. It ships with a factory-threaded 4.50" barrel and a factory-milled, optic-ready slide to accept most micro red dots. The package includes five 10-round magazines, a ballistic case and two interchangeable backstraps for adjustable ergonomics.

Key Specifications

• The caliber is 9mm.
• The barrel measures 4.50" and is threaded.
• The magazine capacity is 10 + 1.
• The action is Double / Single Action.
• The slide is Optic Ready/Serrated.
• The sights are Fixed 3-Dot Night.
• The grip uses an Interchangeable Backstrap system.
• The frame finish is Black.
• Included accessories are five 10-round magazines, a ballistic case, and two backstraps.
• Equipped with FN's Low-Profile Optics-Mounting System for micro red dot compatibility.

Designed for shooters who require a durable service pistol with modern ergonomics and sighting options, the FN 509T pairs a threaded barrel and optic-ready slide with a flat-faced trigger and enhanced grip texture for consistent control through extended sessions. The bundled magazines, case, and backstraps provide immediate range readiness and adaptable fit, making this package well suited for duty use, training, and high-round-count ranges where reliability and modularity matter most.