The Meprolight ML11516O Tru-Dot night sights for HK USP Full Size pistols are self-illuminated tritium sights designed to keep your sight picture sharp in low-light conditions without batteries or switches. Unlike fiber-optic or LED systems, these night sights use gas-powered tritium vials to glow continuously, making them reliable in darkness, fog, or any lighting where standard steel sights fade into uselessness. Each sight—front and rear—contains its own green tritium light source, giving you a green/green 3-dot configuration that's fast to acquire and proven effective by NATO, U.S., and Israeli military forces.

Built for the shooter who needs accuracy when it matters most, these sights work in the rain, mud, and grime of the field without degradation. Solvents, oils, and harsh cleaning chemicals won't affect their glow. The front sight's bright green contrasts cleanly with the rear sight, speeding target acquisition in dim or no-light scenarios—whether you're running a duty gun, a home-defense pistol, or a low-light training platform. Installation is straightforward for the HK USP Full Size platform, and Meprolight backs them with a 12-year warranty to the original owner.

If low-light performance and set-it-and-forget-it reliability matter to you, these tritium night sights are a field-proven upgrade that will serve you for years without maintenance, recalibration, or power concerns.

Key Features

• Self-illuminated green tritium vials—no batteries or switches required
• Green/green 3-dot sight picture for rapid target acquisition
• Designed specifically for HK USP Full Size pistols
• Proven performance with NATO, U.S., and Israeli military forces
• Resistant to weather, gun solvents, and oils
• 12-year manufacturer warranty

Specifications

Product	Meprolight ML11516O Tru-Dot Night Sights
Fit	HK USP Full Size
Sight Picture	Green/green 3-dot
Light Source	Tritium gas vials (front and rear)
Warranty	12 years (original purchaser)
Included	Front and rear night sights

Frequently Asked Questions

Will these night sights work for my HK USP Full Size?

Yes. The Meprolight ML11516O is specifically designed to fit the HK USP Full Size platform.

Do these tritium sights require batteries or need to be charged?

No. Tritium is a self-illuminating radioactive gas that glows continuously without power, batteries, or charging. They work passively in any lighting condition.

What's the difference between the green/green sight picture and other color options?

The ML11516O features green tritium in both the front and rear sights, creating a green/green 3-dot sight picture. Meprolight makes other Tru-Dot models in green/yellow and green/orange configurations, but this model is green/green for high-contrast acquisition.

How long do tritium night sights last?

Tritium has a half-life of about 12 years, which is also the term of Meprolight's warranty on these sights. Brightness gradually diminishes over time, but the sights will remain functional well beyond the warranty period.