FN 509M Tactical | 9mm | 4.5″ Threaded

The FN 509M Midsize Tactical is a multi-role, optics-ready 9mm pistol designed for informed shooters who want a balance of capacity and concealability. Its 4.5-inch threaded barrel and factory optics-mounting system make it ready for suppressor-capable configurations and red-dot use. The pistol ships with both a 15-round full-hand grip option and higher-capacity 24-round magazines for extended sessions at the range. For a durable, purpose-built red dot under $1,000 that pairs well with this platform, consider the Holosun 507C.

Product Specifications

• The caliber is 9mm.
• The action is Semi-Auto.
• The barrel measures 4.5 inches and is threaded to 1/2×28.
• The frame is constructed from polymer.
• The finish is a PVD black coating.
• The pistol ships optics-ready with the FN Low-Profile Optics-Mounting System.
• The sights are suppressor-height 3-dot night sights.
• The package includes five magazines (one 15-round and four 24-round magazines).
• The product ships with two interchangeable backstraps.
• The barrel is cold hammer-forged stainless steel with a recessed target crown.
• The slide has a long-wearing PVD finish and features an external extractor and loaded chamber indicator.
• The optic footprint supports MULTIPLE footprints for common micro red dots.
• The UPC is 845737017415.

The FN 509M Midsize Tactical is tuned for shooters who want a dependable, adaptable carry-sized pistol that performs on the range and on duty. Its optics-ready slide and threaded barrel make accessory installation straightforward, while the mix of magazine sizes gives you flexibility for training or extended shooting sessions. Fit, finish, and ergonomics emphasize fast sight acquisition and controllable recoil impulse so you can shoot accurately at speed.