FN USA FN 509 Tactical Handgun 9mm Luger 10rd Magazines (2) 4.5″ Threaded Barrel FDE NMS
$819.00
The FN 509 Tactical is a 9mm Luger handgun designed for versatility, featuring a 4.5″ threaded barrel and a low-profile optics mounting system for enhanced accuracy and performance. This model includes two 10-round magazines and is ideal for tactical applications, including home defense and competitive shooting.
3 in stock
The FN 509 Tactical an extension of the FN 509 family is based on FN’s submission pistol that the U.S. Army tested for its Modular Handgun Trials but includes the significant improvements to the design that were implemented in the FN 509. The pistol features the company’s U.S Patent No. 10/352654 Low-Profile Optics Mounting System that enables the platform to accept more than ten commercially-available miniature red dot (MRD) optics that co-witness with the suppressor-height night sights and remain adaptable to future optics releases with no requirement of direct milling of the slide. The slide cap for use when not shooting with an optic has raised sight wings that protect iron sight alignment if the pistol is dropped or jostled and provides a textured ramp for racking the slide against a belt loop pant pocket or boot. An FN-signature 4.5-inch cold hammer-forged stainless-steel barrel with target crown ½” x 28 threads that accept the bulk of 9mm suppressors available and thread cap with integrated O-ring to prevent loosening during use complete the top end.
| Weight | 3.900 lbs |
|---|---|
| Dimensions | 12.000 × 11.000 × 3.000 in |
| Manufacturer | FN USA |
| Caliber | 9mm Luger |
| Action | Semi-Automatic |
| Barrel Length | 4.5″ |
| Capacity | 10 |
| Finish | FDE |
| Thread Pattern | ½” x 28 |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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