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The AmeriGlo GL391 optic-compatible sight set for Glock delivers low-profile night-shooting capability without sacrificing co-witness compatibility with red dots and reflex optics. Built for shooters who want reliable tritium sights that won't interfere with mounted optics, this XL tall front sight and i-Dot rear sight combination gives you two independent aiming solutions: bright green tritium that glows in darkness and LumiGreen outline that catches ambient light for daylight performance. Whether you're a competition shooter, defensive carrier, or hunter who runs optics on a Glock, these sights keep you effective from first light to last.
The XL tall front sight elevates your sight picture for better visibility through 1/3 co-witness height optics, while the green tritium elements maintain visibility in the lowest-light environments. The i-Dot rear sight features AmeriGlo's proven dot-and-notch design for quick target acquisition and precise aiming. Unlike full-height traditional sights, the optic-compatible profile means your mounted red dot or reflex optic stays the primary aiming system while these sights function as a reliable backup you can actually see in low light—not just a fallback. Tritium is maintenance-free; no battery, no charging, no failure modes except time itself.
Glock shooters often face a choice: tower-tall sights that interfere with optics, or slim irons that disappear in darkness. The GL391 splits the difference, giving you height for sight picture and light-gathering technology that actually works when you need it. Installation is straightforward on compatible Glock models, and the proven tritium/LumiGreen combo has become the standard for serious Glock users who won't compromise on both day and night capability.
| Brand | AmeriGlo |
| Model | GL391 |
| Sight Type | Optic-compatible tritium night sights |
| Front Sight | XL Tall, Green Tritium with LumiGreen outline |
| Rear Sight | i-Dot, Green Tritium |
| Compatibility | Glock handguns (specific models determined by dovetail) |
| Co-Witness Height | 1/3 co-witness with standard optics |
Yes. The XL tall profile is designed to sit at 1/3 co-witness height, placing the sights in the lower portion of your optic's window so they don't obscure your sight picture. The rear sight won't block the red dot, and you can use either the sights or the optic as your primary aiming system.
No. Tritium is self-luminous and requires no battery, charging, or maintenance. It glows continuously for years; brightness is greatest in complete darkness and decreases gradually over the tritium's lifespan, which is typically 10–12 years.
The front sight is XL tall with a green tritium dot and LumiGreen outline for visibility in all lighting conditions. The rear sight features AmeriGlo's i-Dot design—a smaller tritium dot centered in the notch—which speeds up target acquisition during transitions and follows the modern competition and defensive carry standard.
The GL391 is designed for Glock handguns with standard dovetail cuts. Confirm compatibility with your specific Glock model before purchase, as dovetail depth and width vary across the Glock lineup.
SKU: 115653429 • Width: 3.5in • Height: 1in • Depth: 4.9in • Weight: 0.1oz