Trijicon Night Sights for FN 509 Iron Sight Set
Trijicon
$108.69
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Trijicon
Trijicon Night Sights for FN 509 Iron Sight Set
The Trijicon Night Sights for the FN 509 deliver the legendary low-light performance trusted by law enforcement agencies and competitive shooters worldwide, giving you a decisive edge when every second counts.
- Instantly visible sight picture in complete darkness or low-light conditions
- Tritium-powered illumination requires no batteries or external light source
- Increased daylight dot visibility for faster target acquisition in bright conditions
- Enhanced protection against heavy recoil and harsh cleaning solvents
- Evenly distributed light output for a consistent, crisp aiming point
- Drop-in fit designed specifically for the FN 509 pistol platform
Who This Is For
These Trijicon night sights are ideal for FN 509 owners who carry concealed, work in law enforcement, or simply demand reliable performance in any lighting environment. Whether you're on a home defense nightstand or competing in low-light shooting drills, these sights remove the guesswork and keep you on target when it matters most.
Specifications
| Brand | Trijicon |
|---|---|
| Model | Night Sights for FN 509 |
| Part Number | FN04 |
| Compatible Firearm | FN 509 (all variants) |
| Sight Type | Tritium Night Sights (Front & Rear Set) |
| Illumination | Self-luminous tritium, no batteries required |
| Dot Color | Green Tritium with White Outline |
| Construction | Steel housing with protective coating |
| Installation | Drop-in replacement, professional installation recommended |
| Made In | USA |
Frequently Asked Questions
Will these Trijicon night sights fit all versions of the FN 509?
These sights are specifically engineered for the FN 509 platform. They are compatible with the standard FN 509, 509 Compact, and most 509 variants that share the same sight cut dimensions. If you own the FN 509 Tactical or another variant, confirm the sight cut spec with your gunsmith before installation to ensure a proper fit.
How long do tritium night sights last, and will they dim over time?
Tritium has a half-life of approximately 12 years, meaning your Trijicon night sights will deliver bright, reliable illumination for well over a decade of regular use. After that point, the glow gradually dims but remains functional. Trijicon backs their sights with a limited lifetime warranty, reflecting confidence in their long-term durability.
Do I need a gunsmith to install these sights on my FN 509?
While these are designed as a direct replacement for the factory sights, installation requires pressing out and seating steel sight components precisely — a process that benefits from a proper sight pusher tool or a qualified gunsmith. Improper installation can damage the sight or the slide, so professional installation is strongly recommended for best results.
