XS Sights R3D Night Sight Set for Glock 20/21/29/30/30S/37/41 - Steel 3-Dot Tritium with Ember Glow Front Dot

The XS Sights R3D night sight set for Glock 20/21/29/30/30S/37/41 combines a traditional 3-dot tritium sight picture with a modern twist: a photoluminescent glow dot on the front sight that charges from ambient light and glows distinctly in low-light and no-light conditions. Built on a steel frame with CNC machining and finished in black, these sights are engineered to keep your focus locked on the front post whether you're training in daylight or responding in the dark. If you carry or train with a large-frame Glock and want sights that work around the clock without batteries or electronics, the R3D delivers the reliability and visibility serious shooters demand.

The optical strategy here is clever: the front sight uses a brighter tritium vial paired with the proprietary glow dot, which means it naturally stands out more than the two tritium dots in the rear. This hierarchy of brightness keeps your eye on the front sight for faster, more accurate target acquisition. The rear sight's blacked-out design with dual tritium vials ensures proper alignment without competing for your attention. You get a traditional notch-and-post sight picture that feels familiar to shooters of all backgrounds.

XS Sights engineered these sights to perform in any lighting scenario. The glow dot absorbs available light all day and releases it when darkness falls, bridging the gap between daylight precision and night-fighting capability. Steel construction means they're built to take the recoil and handling abuse that comes with regular use on the range or in the field. For Glock shooters who want tritium without compromise—and who value a front sight that truly stands out—the R3D is a proven choice.

Key Features

• 3-dot tritium sight picture with notch-and-post design for fast, repeatable sight alignment
• Proprietary photoluminescent glow dot on front sight absorbs ambient light and glows in darkness
• Brighter front tritium vial keeps focus on the front post for accurate indexing
• Blacked-out rear sight with dual tritium vials ensures proper alignment without outshining the front
• CNC-machined steel construction in black finish for durability and corrosion resistance
• Fits Glock 20, 21, 29, 30, 30S, 37, and 41

Specifications

Front Sight Length	0.500"
Front Sight Width	0.145"
Front Sight Height	0.215"
Rear Sight Length	0.345"
Rear Sight Width	0.750"
Rear Sight Height	0.340"
Frame Material	CNC Machined Steel
Frame Color	Black
Front Sight Color	Green Tritium with Green Outline and Glow Dot
Rear Sight Color	Green Tritium
Firearm Compatibility	Glock 20, 21, 29, 30, 30S, 37, 41
Sight Type	3-Dot Set

Frequently Asked Questions

Which Glock models will these sights fit?

The XS Sights R3D is designed for Glock 20, 21, 29, 30, 30S, 37, and 41. These are primarily large-frame Glock handguns. Always verify your specific model before purchase.

How does the glow dot work in low light?

The front sight features a proprietary photoluminescent glow dot that absorbs ambient light throughout the day and releases that light in darkness or low-light conditions. It requires no batteries or electronics—the glow is passive and always ready.

What's the difference between the front and rear sight tritium brightness?

The front sight uses a brighter tritium vial paired with the glow dot, making it more prominent than the rear sight's dual tritium dots. This design intentionally draws your eye to the front post for faster and more accurate sight picture formation.

Are these sights suitable for night fighting or self-defense use?

The R3D sights combine tritium for complete darkness with a glow dot that charges from ambient light, making them practical for low-light and no-light scenarios. They're used by shooters training for defensive applications, though the final decision on any defensive tool always rests with the individual shooter.