Overview

For operators and enthusiasts seeking a compact carry pistol with tactical upgrades, this lightly used platform brings precision machining and thoughtful ergonomics to a proven service pistol footprint.

AGENCY ARMS FN 509 is a used FN 509 in 9mm with a 4 inch barrel and an Agency Arms optic-cut slide. The pistol pairs a stippled polymer frame with two interchangeable backstraps (one stippled and installed, the other smooth), an ambidextrous slide release and magazine release, and crisp white three-dot sights. It ships with the extra factory slide backplate (an Agency Arms “A” backplate is installed) and a factory soft case. Note: this 509 does not come with a magazine and is priced at $2,250.99.

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Design and Tactical Features

The optic-cut Agency Arms slide allows for fast sight acquisition when paired with a compact red dot, while preserving low-profile white three-dot iron sights as a reliable backup. The 4″ barrel balances sight radius and concealability—ideal for duty carry or range work.

Controls and Ergonomics

Ambidextrous slide and magazine releases make the pistol adaptable for left- and right-handed shooters and for tactical transitions. The stippled polymer frame improves purchase under stress; the included interchangeable backstraps let users tune grip circumference and texture for consistent recoil management.

What’s Included and Condition

This listing is for one used pistol in very clean, lightly used condition. It comes with the Agency Arms “A” backplate installed, an extra factory slide backplate, and a factory soft case. Important: no magazine is included. View product details and pricing: View product details and pricing

Practical Applications

Chambered in 9mm, the platform delivers controllable recoil, ample magazine capacity when loaded (purchasing magazines separately is recommended), and inexpensive ammunition for high-volume training. Agency Arms is known for precision slide work and functional enhancements that improve sighting and trigger feel—attributes that make this pistol suitable for personal defense, range training, and practical shooting.

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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.