Description
When you run a red dot on your Glock MOS slide, your factory irons usually sit too low to be of any use. That's exactly the gap the AmeriGlo GL349 fills. This 3XL Tall set is built to sit high enough to line up through your optic window, giving you a lower 1/3 or full co-witness depending on your setup and giving you real iron sights to fall back on if the dot ever fails or the battery dies at the worst possible moment.
What Sets the GL349 3XL Apart
Both the front and rear carry green tritium vials with crisp white outlines, so you get a genuine three-dot picture day or night. The tritium glows on its own without needing any charge from a light source, which is what makes these a solid pick for carry, home defense, or low-light range work. The blades are case-hardened with a black finish that stays low-key and won't throw glare back at you. Front blade width comes in at 0.125 inches with a square rear notch, a combination that keeps your focus forward and your alignment fast.
Fitment and Optic Pairing
The GL349 fits nearly the entire Glock lineup, covering Gen 1 through Gen 5 models with the exception of the 42, 43, and 48. It's designed for MOS slides and works with popular RMR-footprint optics like the Trijicon RMR, Holosun 407C, 507C, and 508T. Users running everything from a Burris FastFire to a Vortex Venom report the 3XL height sits right at the bottom of the window with all three dots visible, which is the sweet spot most people are after.
Getting Them Installed Right
These are a front and rear set that install into the standard dovetail using a sight pusher or installation tool. The front uses a screw-in setup, so a proper front sight tool makes the job go a lot smoother and helps you snug it down tight. If you're not comfortable pressing sights yourself, a gunsmith can knock the install out in a few minutes and confirm everything is aligned dead center.
Key Specifications
- Manufacturer: AmeriGlo
- Manufacturer Part Number: GL349
- UPC: 644406910619
- Product Type: Front/Rear Set
- Style: Optic-Compatible / Suppressor Height
- Size: 3XL Tall
- Front Sight Style: Green Tritium, White Outline
- Rear Sight Style: Green Tritium, White Outline (2-Dot)
- Rear Notch Shape: Square
- Finish: Case Hardened, Black
- Front Blade Width: 0.125 in (3.18mm)
- Front Blade Height: 0.365 in (9.27mm)
- Rear Blade Height: 0.371 in (9.42mm)
- Overall Rear Height: 0.451 in (11.46mm)
- Fits MOS Slide: Yes
- Fitment: Glock Gen 1-5 (excludes 42, 43, 48)
What’s Included
- Front tritium sight (3XL tall, green with white outline)
- Rear tritium sight (3XL tall, green with white outline)
Frequently Asked Questions
Will the AmeriGlo GL349 co-witness with my red dot?
Yes, the 3XL height is designed to give you a lower 1/3 or full co-witness through most slide-mounted optics on a Glock MOS. It works with RMR-footprint optics like the Trijicon RMR, Holosun 407C, 507C, and 508T. The exact co-witness you get depends on your optic's deck height and mounting plate, but most people find all three dots sit right at the bottom of the window.
Which Glock models does the GL349 fit?
This set fits nearly all Glock Gen 1 through Gen 5 models, with the exception of the 42, 43, and 48. It's built for MOS and optic-cut slides in particular. If you're running a standard dovetail slide, it drops right in as well without any modification.
Are these tritium sights, and do they need charging?
Both the front and rear use green tritium vials that glow on their own with no light source or battery required. That constant glow is what makes them dependable for low-light and defensive use. The white outlines around each vial also help them stand out clearly in daylight.
Do I need any special tools to install the GL349?
The rear sight installs into the dovetail with a sight pusher, and the front is a screw-in style that goes on smoother with a proper front sight tool. Having the right tool helps you get the front snug and centered. If you'd rather not press sights yourself, most gunsmiths can install and align the set quickly.





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