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Trijicon built the HD Night Sight set to solve one of the oldest problems in defensive shooting: getting the front sight on target fast when the light goes bad. The front blade is taller than a standard sight and ringed in bright photoluminescent orange, so it grabs your eye the second you present the gun. Behind it sits a green tritium lamp that keeps glowing long after the sun's down. The rear is intentionally blacked out with a wide U-shaped notch, which strips away distractions and lets that orange front dot do the work.
The wide rear notch is the real story here. Instead of three competing dots fighting for your attention, the blacked-out rear frames the orange front and speeds up alignment during those tricky transitional-light moments at dawn, dusk, or under mixed lighting. Folks with aging eyes especially tend to notice how quickly that front sight jumps out. The front face of the rear sight is also steeply hooked, giving you a hard edge to rack the slide one-handed against a belt or boot heel if you ever need to.
Each tritium lamp is sealed inside an aluminum sleeve and capped with a sapphire jewel that spreads the light evenly while shielding the lamp from cleaning solvents and punctures. A protective clear coat over the paint keeps the orange bright through years of range time and holster wear. The tritium itself runs bright for roughly a dozen years, so this is a set-it-and-forget-it upgrade.
This GL104O set is cut for Glock large frame pistols and drops right onto models 20, 21, 21SF, 29, 30, 36, 40, and 41, including the S and SF variants. Installation is straightforward with a sight pusher and a Glock front sight tool, and plenty of owners report the rear seating cleanly in the dovetail with no fuss. If you'd rather not tackle it yourself, most gunsmiths can knock it out in a few minutes.
This GL104O set is designed for Glock large frame pistols and fits models 20, 21, 21SF, 29, 30, 36, 40, and 41, including the S and SF variants. It is not cut for standard or slim frame Glocks like the 17, 19, 43, or 48, so make sure your slide matches the large frame profile before ordering.
The green tritium in these sights stays usefully bright for around twelve years, which is typical for tritium night sights. It glows continuously without needing batteries or a charge, so there's nothing to switch on when you draw in the dark.
For a clean install you'll want a sight pusher for the rear and a Glock front sight tool for the front screw. Many owners find the rear seats right into the dovetail with no filing needed, though results vary by slide, and any gunsmith can handle the job quickly if you'd rather not do it yourself.
The orange photoluminescent ring around the front tritium lamp makes the front sight jump out fast in daylight and mixed light, while the rear stays blacked out so it doesn't compete for your focus. This setup speeds up front sight acquisition and is a favorite for carry and home defense, especially for anyone whose eyes aren't as sharp as they used to be.
| UPC | 719307209695 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GL104O |
| Color | Orange Outline |
| Elevation Adjustment | No |
| Length | 7.1 |
| Model | |
| Package Height | 0.7 |
| Package Width | 5.1 |
| Product Type | Accessory-Lasers and Sights |
| Shipping Weight | 0.1 |
| Sights | Orange Front and Black Rear |
| Style | 3-Dot |
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