XS Sights DXT2 Pro Big Dot Night Sights for Glock 20/21 Green
XS Sights
$141.39
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XS Sights
XS Sights DXT2 Pro Big Dot Night Sights for Glock 20/21 Green
The XS Sights DXT2 Pro Big Dot Night Sights for Glock 20/21 deliver lightning-fast target acquisition in any lighting condition, combining a large tritium-lit front dot with a low-profile V-notch rear for the ultimate defensive sight system.
- Industry-leading Big Dot front sight drives focus for rapid target acquisition
- Aluminum-sleeved tac lamp tritium vial offers superior durability and impact resistance
- Black Nitride finish provides exceptional corrosion resistance in harsh conditions
- Glow dot absorbs ambient light, glowing in low light before tritium kicks in
- Convex dot design increases light absorption for a more intense glow charge
- Low-profile V-notch rear keeps your focus locked on the front sight instinctively
Who This Is For
The XS DXT2 Pro Big Dot sights are purpose-built for Glock 20 and 21 owners who demand reliable, fast-acquisition sighting in defensive and duty applications. Whether you're a concealed carry holder, law enforcement professional, or serious home-defense shooter, these sights excel in low-light environments where split-second decisions matter most. If you're upgrading from factory Glock sights and want a proven, battle-tested system that works around the clock, the DXT2 Pro is the upgrade your pistol deserves.
Specifications
| Brand | XS Sights |
|---|---|
| Model | DXT2 Pro Big Dot |
| Compatible Firearms | Glock 20, Glock 21 |
| Front Sight | Big Dot Tritium with Glow Dot |
| Rear Sight | Low-Profile V-Notch |
| Tritium Insert | Aluminum-Sleeved Tac Lamp Vial |
| Finish | Black Nitride |
| Sight Color | Green Tritium |
| Sight Picture | Dot-the-i System |
| Installation | Drop-In, Professional Install Recommended |
| Country of Origin | USA |
Frequently Asked Questions
Will these sights fit both the Glock 20 and Glock 21?
Yes, the XS Sights DXT2 Pro Big Dot Night Sights are specifically designed and machined to fit both the Glock 20 (10mm Auto) and the Glock 21 (.45 ACP). These full-size Glock models share the same sight dovetail dimensions, making this a direct-fit upgrade for either pistol. Professional installation is recommended to ensure proper torque and alignment.
How does the glow dot work alongside the tritium vial?
The DXT2 Pro uses a two-stage illumination system. In dim or transitional lighting conditions, the photoluminescent glow dot absorbs ambient light and re-emits it as a visible glow — meaning it works before it's dark enough for tritium to stand out. Once ambient light drops to true low-light or nighttime levels, the self-illuminating tritium vial takes over, glowing continuously without needing a light source. Together, these technologies ensure your front sight is always visible, day or night.
How long does the tritium in these sights last?
Tritium is a mildly radioactive isotope that naturally decays over time. In XS Sights' DXT2 Pro series, the tritium vial has an operational lifespan of approximately 12 years before brightness diminishes to roughly half its original intensity. The sights will still function after this period, but the glow will be less visible in very dark conditions. The aluminum-sleeved tac lamp tritium insert is engineered for enhanced durability to protect the vial from impact, extending the usable life of the sight system.
