AmeriGlo Optic-Compatible 3XL Tall Night Sights for Glock — Green Tritium with LumiGreen Outline, .365" Front / .451" Rear, Black Rear (GL-691 • GL691 • UPC 644406910664)
Upgrade your Glock for confident sight acquisition—day or night and with or without a slide-mounted optic. The AmeriGlo Optic Compatible Set (GL-691) features a 3XL Tall suppressor/optic-height configuration with a .365" front and .451" rear, delivering reliable co-witness capability on most Glock MOS and optic-cut slides. A crisp Green Tritium lamp surrounded by a fast LumiGreen daylight outline drives your eye to the front blade, while the black rear sight keeps your sight picture uncluttered for faster, more precise shooting.
Why Choose GL-691 for Your Glock
True Optic-Height Sights: The 3XL Tall profile is engineered to clear many popular slide-mounted red dots, supporting lower-third or absolute-style co-witness depending on your optic/plate height and slide cut.
Front-Sight Focus: Green Tritium for low/no light + LumiGreen high-contrast ring for daylight make the front blade pop in any condition.
Clean, Black Rear: The plain black rear reduces distraction, improving alignment and precision under time pressure.
Key Features at a Glance
Compatibility: Fits all Glock models that accept standard Glock sight dovetails (compact, full-size, and many slimline models; see compatibility notes)
Sight Heights: Front .365", Rear .451" (3XL Tall)
Front Sight: Green Tritium vial with LumiGreen photoluminescent outline for daytime visibility
Rear Sight: Black, serrated (no tritium) for a crisp, glare-free notch
Use Case: Optic-compatible / suppressor-height for MOS and RDS-equipped pistols; also great for suppressed shooting
Model / UPC: GL-691 / 644406910664
Built for Speed and Confidence
24/7 Visibility: Tritium glows on its own in darkness; the LumiGreen ring charges quickly in ambient light to keep the front blade bold at dusk, on indoor ranges, and in transitional lighting.
Rapid Front-Sight Acquisition: The big, bright front draws your focus instantly, while the black rear notch promotes a sharp top-edge alignment for precision shots.
Rugged Construction: Machined steel sights with secure dovetail fit and proven finishes designed to withstand holster wear, sweat, and hard training cycles.
Ideal Applications
RDS Co-Witness: Pair with popular pistol red dots (RMR®, Holosun®, EPS/CARRY™, etc.). Heights often yield lower-third co-witness; specific interface varies by plate and optic.
Concealed Carry & Duty: Daylight-bright front with night-ready tritium gives a consistent sight picture on the street or in the field.
Suppressed Pistols: Extra height clears common 9mm suppressor profiles for an uninterrupted sight picture.
Compatibility Notes
Works with most Glock pistols using standard Glock dovetails (G17/19/22/23/26/27/34/35 and others).
For slimline models (G43/43X/48), confirm your slide uses the standard front-sight screw and rear dovetail spec before purchase; some users prefer model-specific sets.
Co-witness result depends on optic footprint, plate thickness, and window height. The .365"/.451" combo is widely used to get above many optics and suppressors.
Installation Tips (Best Practices)
Tools: Use a Glock front-sight nut driver and a quality sight pusher for the rear; avoid hammering the sight.
Prep: Degrease dovetails/screws; use blue threadlocker on the front-sight screw per manufacturer guidance.
Centering: Drift the rear sight to mechanical center, then fine-tune at the range.
Zero: Confirm POA/POI with your carry load. Adjust windage by small increments; re-torque and re-check.
Co-Witness Check: After mounting your optic, confirm desired lower-third or absolute co-witness and ensure the irons are visible through the window without interference.
Specifications
Brand: AmeriGlo
Product Type: Optic-Compatible Night Sight Set
Model: GL-691 / GL691
Front Height: .365" (3XL Tall)
Rear Height: .451" (3XL Tall)
Front: Green Tritium with LumiGreen outline
Rear: Black, serrated, non-tritium
Finish/Color: Black
Fitment: All Glocks (standard dovetail)
UPC: 644406910664
Note on Tritium: Tritium lamps contain a small, sealed radioactive source commonly used in night sights. Handle normally; do not attempt to open or modify. Dispose and recycle per local regulations when service life ends.
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SEO Title: AmeriGlo GL-691 Optic-Compatible 3XL Tall Night Sights for Glock — Green Tritium/LumiGreen, .365" Front, .451" Rear, Black Rear
Meta Description (≤160 chars): AmeriGlo GL-691 3XL Tall night sights for Glock. Green tritium with LumiGreen front, black rear. Optic-height .365"/.451" for MOS co-witness.
Target Keywords: AmeriGlo GL-691, GL691 Glock sights, 3XL tall suppressor height sights, optic compatible Glock sights, Green tritium LumiGreen, .365 front .451 rear, Glock MOS co-witness
Alt Text (Images): “AmeriGlo GL-691 3XL Tall optic-compatible Glock sights with Green Tritium/LumiGreen front and black rear, .365” front /.451” rear.”
FAQ
Q: Will GL-691 co-witness with my red dot?
A: In many setups, yes—often lower-third. Exact result depends on your optic, plate thickness, and slide cut.
Q: Are these truly “all Glock” compatible?
A: They fit standard Glock dovetails. For certain slimline or special-edition slides, verify dovetail specs or choose a dedicated AmeriGlo set.
Q: Is the rear sight tritium-illuminated?
A: No. The black rear is intentionally non-tritium to keep the focus on the bright, tritium-powered front blade.
Q: How long does the tritium glow last?
A: Tritium typically provides useful brightness for 10–12 years before gradually dimming.
Q: Do I need a gunsmith?
A: Many shooters install at home with the right tools. If you’re unfamiliar with sight pushers or torque specs, a qualified gunsmith is recommended.
Equip your Glock with the AmeriGlo GL-691 Optic-Compatible 3XL Tall Night Sights and get a bold, day-bright front, a clean black rear, and the optic-height you need for co-witness confidence—on duty, at the range, and everywhere in between.
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