FN 509 Tactical 9mm 4.5″ Threaded Barrel Optic-Ready
About this product
The FN 509 Tactical is a full-size, service-oriented pistol from FN that pairs a threaded cold hammer-forged barrel with an optic-ready slide and suppressor-height night sights. It features FN’s Low-Profile Optics Mounting System to accept a range of miniature red-dot optics while preserving co-witness with the raised night sights. The pistol is built on a matte black polymer frame with interchangeable backstraps and an accessory rail for MIL-STD-1913 attachments. Designed for users who need an optic-ready platform with threaded-barrel capability, the 509 Tactical emphasizes reliability and modularity without compromise.
Key Specifications
- Caliber: 9mm.
- Barrel length: 4.50 inches.
- Action: Double Action Only.
- Capacity: 10+1.
- Weight: 27.90 oz.
- Frame: Matte black polymer frame with Picatinny rail.
- Slide: Optic-ready serrated stainless steel slide.
- Sights: Suppressor-height tritium night sights.
- Threading: 1/2×28 threaded barrel with O-ring thread cap.
- Optics mount: FN Low-Profile Optics Mounting System (patented).
With an optic-ready slide, robust threaded barrel and suppressor-height sights, the FN 509 Tactical is well-suited to range, duty, and suppressed-shooting applications where reliability and modularity matter. Its full-size ergonomics, interchangeable backstraps and mil-spec accessory rail give shooters a practical platform for a wide range of setups and mission profiles.
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Specs at a glance
Key attributes
| upc | 845737010195 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-100527 |
| action | Double Action Only |
| atf type | Pistol |
| barrel length | 4.50" |
| caliber/gauge | 9mm |
| capacity | 10 + 1 |
| color | Black |
| length | 12 |
| number of magazines | 2 |
| package height | 3.5 |
| package width | 11.5 |
| product type | Pistol |
| safety | Loaded Chamber Indicator |
| shipping weight | 3.9 |
| sights | Suppressor Height Night Sights |
| sights type | 3-Dot Night/Suppressor Height |
| slide description | Optic Ready/Serrated |
| units per box | 1 |