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When you mount a red dot on your Glock, your factory irons vanish below the optic window. The AmeriGlo GL691 3XL fixes that. This is a suppressor-height sight set built tall enough to sit up in the glass, so your irons line up right through the window and give you a real backup if the dot ever goes dark. It works on Glock MOS slides and other optic-cut slides, and fits all Glock Gen 1-5 models except the 42 and 43.
The front sight runs a green tritium lamp ringed with a bright LumiGreen outline, so you get a glowing dot in the dark and a high-contrast target in daylight. The rear is a clean flat black blade, which keeps your eye pulling straight to that front dot instead of chasing extra lamps. It's a proven setup for red dot shooters who want an uncluttered co-witness and a front sight that pops the second you present the pistol.
Both sights are CNC machined from steel with a matte black finish, so they hold up to holster wear, cleaning solvents, and years of carry. This is the 3XL height, measuring roughly a .365 inch front and a .451 inch rear, which puts them in the tall range meant for co-witnessing over a mounted optic or clearing a suppressor. The tritium is Swiss made and the green lamps carry a 12 year warranty, so you're looking at a long service life before they start to dim.
Installation is straightforward if you have the right tools. The front sight threads on with a hex screw, and a dab of blue thread locker keeps it from backing out. The rear drifts into the dovetail from the side, and a sight pusher is the way to go here rather than a punch and hammer. Once they're mounted and zeroed at the range, they stay put through thousands of rounds. If you're not comfortable pressing sights yourself, any gunsmith can knock this out in a few minutes.
Yes, that's exactly what this set is built for. The 3XL height raises the front and rear sights tall enough to sit up in the optic window, so you can line up your irons through the glass and use them as a backup if your dot loses power. Actual co-witness height depends on your specific optic and mounting plate, so it's worth confirming your red dot's window height falls in the tall range.
It fits all Glock Gen 1-5 models except the 42 and 43, and it's made to work with MOS and other optic-cut slides. Since it's an optic-height set, it really shines on a pistol that already has a slide-mounted red dot or a suppressor. If you're running a standard slide with no optic, these will sit noticeably taller than factory irons.
The green tritium lamps are Swiss made and carry a 12 year warranty, which is the standard mark before the glow starts to noticeably fade. In practice you'll get plenty of usable low-light visibility for years of carry and range use. If a front lamp ever looks dim, it's often just carbon buildup on the lens that wipes clean with a little solvent.
You can if you have the right tools. The front sight threads on with a hex screw and benefits from a drop of blue thread locker, while the rear drifts into the dovetail using a sight pusher rather than a punch and hammer. If you'd rather not press them yourself, any gunsmith can install and zero them quickly.
| UPC | 644406910664 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GL691 |
| Color | Green, Green |
| Model | |
| Product Type | Sight |
| Style | Optic-Compatible |
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