Truglo Tritium Pro Night Sights for FN FNX-40
Truglo
$76.69
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Truglo
Truglo Tritium Pro Night Sights for FN FNX-40
The TruGlo Tritium Pro Night Sight Set for the FN FNX-40 delivers reliable, self-illuminating aiming performance around the clock — no batteries, no charging, just consistent visibility when it matters most.
- Self-luminous tritium vials glow green in low-light and complete darkness
- Front sight FOCUS LOCK ring accelerates target acquisition under stress
- Angled rear sight edge enables emergency one-handed slide manipulation
- White dot front and rear for crisp, high-contrast daytime sight picture
- Compact profile maintains the factory sight radius of your FNX-40
- No batteries or light charging required — tritium glows autonomously 24/7
Who This Is For
These night sights are ideal for FN FNX-40 owners who rely on their pistol for home defense, concealed carry, or duty use — anyone who needs a dependable sight picture in unpredictable lighting conditions without the hassle of battery-powered optics or photo-luminescent sights that fade after minutes in the dark.
Specifications
| Brand | TruGlo |
|---|---|
| Model | Tritium Pro |
| Part Number | TG231F2W |
| Compatible Firearm | FN FNX-40 |
| Sight Type | 3-Dot Tritium Night Sights |
| Illumination | Self-Luminous Tritium (No Battery) |
| Tritium Color | Green |
| Sight Radius | Factory Matched |
| Rear Sight Feature | Angled Edge for One-Hand Operation |
| Front Sight Feature | FOCUS LOCK Ring |
| Installation | Gunsmith Recommended |
Frequently Asked Questions
How long will the tritium in these sights last?
Tritium has a half-life of approximately 12 years, meaning your TruGlo Tritium Pro sights will provide reliable self-luminous glow for well over a decade before any noticeable dimming occurs. Most manufacturers, including TruGlo, design their tritium sights with brightness levels that remain functional throughout this service life under normal use.
Do these sights fit all FN FNX-40 variants?
The TruGlo Tritium Pro TG231F2W is specifically engineered for the FN FNX-40 pistol. If you own a different FN model — such as the FNS-40 or FNX-45 — you will need a different sight set, as sight dovetail dimensions and sight heights can vary between models. Always confirm your exact model before purchasing.
Can I install these night sights myself, or do I need a gunsmith?
While some experienced pistol owners install their own sights using a dedicated sight pusher tool and bench block, TruGlo recommends professional installation by a qualified gunsmith to ensure proper fit, correct torque on set screws, and accurate zero. Improper installation can damage the sight or the pistol's slide, so professional fitting is always the safer choice.
