FN 509T FDE: Precision 9x19mm Semi-Automatic for Defense

When it comes to carry, duty, or home defense, a pistol needs to combine rugged reliability with ergonomic control and modern features. Experienced operators and everyday carriers alike look for a platform that balances accuracy, recoil management, and accessory readiness without unnecessary complexity.

FN 509 TACTICAL [FDE] is a 9x19mm semi-automatic pistol offered in a Flat Dark Earth finish, listed at $799.99 and noted as PISTOL: FN HERSTAL FIREARMS MODEL FN 509T, SERIAL NUMBER GKS0277586, FLAT DARK EARTH, YES – INCLUDES ORIGINAL BOX, 4.2, 9X19MM, SEMI – AUTOMATIC. That straight-to-the-point product listing tells you what you need to know up front: a compact 4.2″ platform chambered in 9x19mm built by FN, shipped with its original box and priced to compete in the duty-grade market.

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Design and Build: What Makes This FN Stand Out

FN has a long record of producing service-grade firearms, and the FN 509 TACTICAL [FDE] carries forward that lineage. The platform’s 4.2″ barrel length is a sweet spot for carriage and controllability — long enough for reliable ballistics and sight radius, short enough for concealed or duty carry. The Flat Dark Earth color offers low-visibility contrast in many operational settings while providing a durable Cerakote-like finish that resists wear.

Frame, Slide, and Ergonomics

The FN 509 series is known for a textured, modular grip and a chassis that fits a variety of hand sizes. Controls are designed for intuitive access and positive engagement under stress. The slide geometry on the 509T allows for smooth cycling and reliable ejection, while the 4.2″ barrel helps tame muzzle flip compared to shorter-barreled variants.

Factory Kit and Packaging

The listing specifically notes that this firearm includes the original box — an important detail for collectors and buyers who prefer complete factory packaging. The serial number GKS0277586 is listed in the product details; if you’re purchasing from a dealer, verify that the serial matches shipping documentation and transfer paperwork.

Caliber: Why 9x19mm Works for Defense

Chambered in 9x19mm, the FN 509 TACTICAL [FDE] takes advantage of a widely available, controllable, and effective defensive cartridge. Nine-millimeter ammunition offers manageable recoil, high magazine capacity potential, and an excellent balance of terminal performance with modern defensive loads. For training, 9mm is cost-effective and abundant, making practice sessions practical without breaking the bank.

Performance and Practical Shooting

On the range, expect crisp trigger breaks and predictable follow-up shots from a platform designed for duty use. The 4.2″ barrel translates to a practical sight radius and reliable velocity for defensive loads. Semi-automatic function on this model is built around FN’s reputation for durability; treat the FN 509 TACTICAL [FDE] to regular maintenance and cleanings and it will reward you with consistent service.

For optics-ready shooters, the “Tactical” designation typically indicates compatibility with red dot sights or an optics cut on the slide. Confirm the specific slide configuration with the seller on the product page before attempting an optic installation.

Accessories and Customization

The platform supports common aftermarket accessories: holsters formatted for the 509 series, night sights or fiber-optic front sights, and MOS-style optic plates if the slide is pre-cut. The FDE exterior pairs well with tactical accessories in similar tones if you prefer a coordinated setup.

For those wanting to inspect specifics or to buy, View product details and pricing on the shop page and confirm inventory, optic compatibility, and included parts.

Applications: Who Should Consider This Pistol

The FN 509 TACTICAL [FDE] fits multiple roles: a robust duty sidearm for security professionals, a capable home-defense firearm for responsible owners, and a reliable range companion for regular practice. The 4.2″ barrel gives it edge for accuracy over shorter carry pistols while retaining compactness for daily use. The included original box makes it appealing to buyers who value full factory documentation and presentation.

Buying Notes and Pricing

Listed at $799.99, this FN offering sits in the mid-to-upper tier for new duty-ready pistols. Always verify the serial number (GKS0277586) and included items (original box) when purchasing. The product page on Taylor Defense will direct you to the retailer purchase flow; click through to confirm any added shipping or transfer fees and dealer policies.

Ready to inspect the specifics? Check current availability on the product page where you can complete the purchase process through the retailer and confirm any transfer requirements.

For operators and enthusiasts who demand a reliable 9x19mm semi-auto with a practical barrel length, solid ergonomics, and a proven manufacturer behind it, the FN 509 TACTICAL [FDE] is a focused option. Verify the listed specs — FN HERSTAL build, serial number GKS0277586, Flat Dark Earth finish, 4.2″ barrel, 9X19MM chambering, semi-automatic operation, and the included original box — and make your decision based on hands-on handling and your personal defensive requirements.

— John Wick & Garand Thumb

People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.