AmeriGlo Optic Compatible 3XL Tall Sight Set for Glock – Green Tritium White Outline Front & Black Rear, .365" Front / .451" Rear (GL491)
Maximize your Glock’s optic-ready performance with the AmeriGlo GL491 Optic Compatible 3XL Tall Sight Set, engineered for shooters who demand extreme co-witness height, outstanding low-light visibility, and rugged durability. Designed to fit all Glock models, this ultra-tall sight set offers exceptional alignment for pistols equipped with slide-mounted red-dot optics or suppressors.
Featuring a Green Tritium front sight with a bold White outline and a precision-machined black rear sight, this 3XL configuration ensures your iron sights remain visible through even the tallest optic housings—making it the ideal backup aiming system for duty, tactical, or competition-ready Glock builds.
Ultra-Tall 3XL Height – Maximum Co-Witness Capability for Red-Dot Optics
The GL491 sight set utilizes an extra-tall 3XL height profile, specifically engineered for:
Glock MOS pistols
Aftermarket optic-cut slides
Trijicon RMR / SRO
Holosun 407/507/508/509 series
Leupold DeltaPoint Pro
Vortex, Shield, Swampfox, and other duty-grade optics
Suppressor-ready handguns with threaded barrels
Why the 3XL Height Matters:
Achieves clear visibility through tall or enclosed-emitter red dots
Ensures dependable backup sight alignment if your optic fails
Allows full or lower-third co-witnessing
Maintains accuracy even with large suppressor profiles
When maximum optic clearance is needed, nothing performs like AmeriGlo’s 3XL Tall sight system.
High-Visibility Green Tritium with White Outline Front Sight – Fast Target Acquisition Day or Night
The front sight features a bright Green Tritium lamp for self-illuminated nighttime visibility, surrounded by a White photoluminescent outline designed for rapid daytime engagement.
Front Sight Advantages:
High contrast for fast daytime sight pickup
Glows continuously in low-light conditions—no batteries needed
Helps maintain focus during high-stress shooting scenarios
Precise .365" height for reliable 3XL alignment
Whether you're on the range, inside a structure, or outdoors at dusk, the GL491 ensures your front sight stays unmistakably visible.
Black Rear Sight – Clean, Crisp Sight Picture Without Distraction
The rear sight is crafted in a solid black finish, providing a low-glare, no-nonsense sight picture that naturally directs your eye to the bright front sight.
Rear Sight Benefits:
Blacked-out design reduces glare for improved focus
Serrated face ensures crisp sight alignment
Precise .451" height optimized for 3XL co-witness
Ideal for optic-equipped pistols to avoid visual clutter
Together, the front and rear sights create a fast, intuitive sight picture perfect for both rapid-fire and precision shooting.
Fits All Glock Models – Broad Compatibility with No Guesswork
The AmeriGlo GL491 sight set is designed to fit all Glock models, including:
Glock 17, 19, 19X, 20, 21
Glock 22, 23, 26, 27
Glock 29, 30, 31, 32, 33
Glock 34, 35, 41, 42, 43, 43X, 48
MOS and non-MOS configurations
Note: Check slide setup and optic height for final co-witness details.
This makes the GL491 one of the most versatile tall sight sets AmeriGlo offers.
Hardened Steel Construction – Duty-Ready Strength & Reliability
Built from premium hardened steel, the GL491 is engineered to withstand extreme use in law enforcement, military, and competitive shooting environments.
Durability Features:
Impact-resistant steel housing
Corrosion-resistant finish for long-term reliability
Snag-resistant profile for concealed carry
Designed to maintain zero under heavy recoil cycles
Whether you train hard or carry daily, these sights are built to last.
Ideal for Tactical, Duty, Defensive, and Optic-Ready Glock Builds
From concealed carriers to high-level professionals, the GL491’s 3XL height is perfect for shooters who demand maximum optic compatibility and sight clarity.
Ideal for:
If your setup requires the tallest, most reliable optic-compatible sights, the GL491 delivers.
Product Specifications
Brand: AmeriGlo
Model: Optic Compatible 3XL Tall Sight Set
Part Number: GL491
UPC: 644406910640
Front Sight Height: .365"
Rear Sight Height: .451"
Front Sight: Green Tritium with White Outline
Rear Sight: Blacked-Out Steel
Material: Hardened Steel
Compatibility: Fits all Glock models
Purpose: Optic co-witnessing, suppressor height, day/night visibility
The Ultimate Tall Sight Upgrade for Optic-Equipped Glocks
The AmeriGlo GL491 Optic Compatible 3XL Tall Sight Set is the perfect choice for shooters who require extreme optic clearance, superior brightness, and absolute reliability. With its bold Tritium front, distraction-free rear, and ultra-tall co-witness height, this sight set elevates your Glock to its fullest tactical potential.
Upgrade your Glock with AmeriGlo—and experience professional-grade performance every time you aim.
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