Night Fision Night Sight Set Orange Front U Notch Rear for FN 509

FN 509 owners who shoot in low-light conditions need sights that perform when ambient light fades. This Night Fision set pairs an orange front sight with a U-notch rear, both powered by self-illuminating tritium. Whether you're training near Mountain View or preparing for defensive scenarios, proper sight upgrades matter. TacticCAL Gun Store handles FFL transfer in Sunnyvale for optics and sight systems.

Tritium illumination and contrast design

Night Fision's tritium-filled tubes provide continuous glow without batteries or charging. The orange front post creates a sharp aiming reference, while the U-notch rear sight maintains sight picture clarity in darkness and daylight alike. This configuration suits both duty and sport shooting. Proper sight alignment is foundational—check our California-compliant handgun catalog for complete FN 509 options and accessories that pair with this sight system. Browse our gun shop.

Frequently asked questions

Are these sights designed specifically for the FN 509 platform?

Yes. Night Fision engineered this set with dovetail geometry and height specs matched to FN 509 slide cuts. Proper fit depends on correct installation—verify dovetail dimensions before mounting.

Do tritium sights require any maintenance after installation?

Tritium sights are sealed and self-contained. They require no charging, batteries, or servicing. Performance remains consistent for 10–12 years as tritium naturally decays, a normal characteristic of the technology.

Where is the closest FFL dealer to Santa Clara, Mountain View, or Palo Alto?

TacticCAL Gun Store in Sunnyvale is a short drive from Santa Clara, Mountain View, and Palo Alto, serving the South Bay as a full-service FFL dealer for transfers and DROS. Find FFL dealer Los Gatos at TacticCAL.