Hiviz Gmng21-3 N2 Night Sight Set

The Hi-Viz GMNG21-3 N2 night sight set is a tritium-powered upgrade for shooters who need reliable target acquisition in low-light conditions. Night sights are a practical choice for home-defense firearms, range guns, or any shooting situation where ambient light drops and standard iron sights lose their edge. This set brings glow-in-the-dark capability to your handgun, improving sight picture when headlamps, flashlights, or natural light aren't enough.

Tritium night sights use self-luminous technology—no batteries, no charging required—to keep your front and rear sights visible in the dark. They're a permanent upgrade that works instantly, every time. For defensive shooters or hunters working in dim conditions, that's genuine peace of mind.

Hi-Viz is known for straightforward, functional sight solutions that work. These sights are built for the shooter who prioritizes practical low-light performance without unnecessary complexity. If your current sights fade to black when the sun goes down, this is a direct answer.

Key Features

• Tritium-powered night sight technology for hands-free visibility in darkness
• No batteries or charging—self-luminous and always ready
• Designed as a complete sight set with front and rear components
• Improves low-light shooting confidence for defense, hunting, and range work

Specifications

Frequently Asked Questions

What guns do these night sights fit?

The GMNG21-3 designation indicates compatibility with specific handgun models. Verify fitment with the model and manufacturer of your firearm before purchase, as sight installation varies by platform.

How do tritium night sights work?

Tritium is a radioactive isotope sealed in small glass tubes. It glows continuously without power or activation, providing a dim but visible sight picture in complete darkness. The glow is brightest in total darkness and diminishes in daylight.

Do I need to charge or replace tritium sights?

No. Tritium night sights are self-powered and do not require charging, batteries, or external activation. They work passively and continuously, though tritium brightness does fade over many years (typically 10+ years of useful life).

Are these sights suitable for defensive carry?

Night sights are a common upgrade for defensive handguns, especially for low-light environments or home-defense scenarios. They help establish a target sight picture when standard iron sights become unreliable.