Lightweight, reliable, and built for duty use: modern striker-fired pistols need to balance ergonomics, controls, and sighting to be effective for both defensive carry and professional applications. The following breakdown examines a compact option that brings FN’s proven design philosophy into a compact package suitable for a wide range of users.

509 [BLK] *10-ROUND* is presented as FN’s premier modern striker-fired duty and defensive pistol, built as a successor to the FNS series. The pistol features 3-dot luminescent sights, a polymer frame for reduced weight and corrosion resistance, ambidextrous controls, interchangeable backstraps, a loaded chamber indicator, and no manual safety. Two 10-round magazines are included. Shop this product

Design and Controls

FN refined the 509 with user-focused features carried over from the FNS lineage. The polymer frame reduces carry weight and resists corrosion, while interchangeable backstraps allow the grip profile to be tailored for different hands or gloves. Ambidextrous controls make the platform suited to left- or right-handed operators and speed transitions in dynamic environments.

Sights and Ergonomics

The 3-dot luminescent sights provide quick, low-light acquisition without relying on electronics. The all-black color pattern keeps visual signature low and professional. A loaded chamber indicator gives tactile and visual confirmation of status, and the lack of a manual safety simplifies the trigger-to-fire sequence for trained users who prefer passive safeties only.

Duty-Ready Features

FN built this model to meet the expectations of duty and defensive roles: durable striker-fired action, rugged polymer frame, and a focus on controls that reduce administrative friction under stress. Two included 10-round magazines make this model compliant with jurisdictions where lower-capacity options are required, while still offering usable capacity for defensive work. Priced at $639.99, it positions itself as a practical option for professionals and private citizens alike.

View product details and pricing to verify current availability and specifications before purchase.

Choosing the 509 for Carry or Duty

For those prioritizing ambidextrous handling, corrosion resistance, and a simple operational profile, the 509 balances those needs in a compact package. Its combination of polymer frame, luminescent sights, and user-adjustable ergonomics makes it a practical pick for training, daily carry where legal, or departmental issuance. Check availability and confirm local compliance before purchasing.

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