Description
The AmeriGlo GL301 i-Dot sight set takes a different approach than the usual three-dot layout. Instead of asking your eye to balance three glowing dots, the i-Dot uses a dot-over-dot picture: stack the front dot directly above the single rear dot and you're aligned. It's a cleaner, less cluttered sight picture that helps you find the front sight faster, which is exactly what you want when speed counts. The front is a green tritium lamp wrapped in a LumiGreen photoluminescent outline that grabs your eye in daylight, while a single green tritium lamp sits centered below the rear notch for low-light alignment.
What Sets the GL301 i-Dot Apart
These are built from US-made steel bar stock with a matte black finish, so they hold up far better than the plastic sights that ship on a factory Glock. The rear notch runs a wide .180 inches paired with a .140-inch front, giving you plenty of daylight on either side of the front post for a clear picture. The rear sight is extended for a touch more sight radius and has an undercut face to cut glare. Tritium is self-powered, so there are no batteries to swap and the dots glow on their own in the dark.
Fitment for the GL301 Sight Set
This set covers a big chunk of the Glock lineup, fitting Gen 1-4 models in 9mm, .40, and .380, plus Gen 5 in 10mm and .45. That includes popular numbers like the 17, 19, 22, 23, 26, 27, 34, and 35, among others. One thing to note: it does not fit Glock MOS slides, so double-check your slide before ordering.
Living With the i-Dot GL301
Folks who run these tend to praise the quick target acquisition and the tight dovetail fit. The LumiGreen front really pops in sunlight and the tritium keeps working after dark. AmeriGlo's green tritium lamps carry a 12-year glow warranty from the date of manufacture. Installation is straightforward with a sight pusher or a trip to your local gunsmith, and a dab of thread locker on the front screw is never a bad idea.
Key Specifications
- Manufacturer: AmeriGlo
- Manufacturer Part Number: GL-301
- UPC: 644406905301
- Style: i-Dot (dot-over-dot, 2 dot)
- Front Sight: Green tritium with LumiGreen outline
- Rear Sight: Single green tritium, centered below notch
- Rear Notch Width: 0.180 in
- Front Sight Width: 0.140 in
- Front Sight Height: 0.22 in
- Rear Sight Height: 0.315 in
- Material: Steel
- Finish: Matte Black
- Fitment: Glock Gen 1-4 9mm/.40/.380, Gen 5 10mm/.45 (not MOS)
- Illumination: Swiss-made tritium, no batteries
- Tritium Warranty: 12 years (green lamps)
What’s Included
- Front sight (green tritium with LumiGreen outline)
- Rear sight (single green tritium)
Frequently Asked Questions
How does the dot-over-dot design on the GL301 i-Dot work?
Instead of the standard three-dot layout, the i-Dot uses one front dot and one rear dot. You simply stack the front dot directly on top of the rear dot to line up your shot. It's a cleaner sight picture that keeps your eye locked on the front sight for faster target acquisition, and a lot of people find it quicker to pick up than three dots.
Will the AmeriGlo GL301 fit my Glock?
This set fits a wide range of Glocks, including Gen 1-4 models in 9mm, .40, and .380, plus Gen 5 in 10mm and .45. That covers popular models like the 17, 19, 22, 23, 26, 27, 34, and 35. It does not fit Glock MOS slides, so verify your slide type before ordering.
Do these sights need batteries, and how long does the glow last?
No batteries required. The GL301 uses self-powered Swiss-made tritium lamps that glow on their own in the dark. AmeriGlo warranties its green tritium lamps to glow for 12 years from the date of manufacture, after which they gradually dim over time.
Are the GL301 i-Dot sights hard to install?
Installation is pretty manageable with the right tools. The rear sight is a drift-in dovetail that seats tight, and the front is held by a screw from underneath the slide. Many people use a sight pusher or have their local gunsmith knock it out quickly, and adding a little thread locker to the front screw is a smart move.






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