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Ameriglo GL-820: Trooper for GLOCK(R) Gen1-4, G20, G21, G40
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: GL-820
Overview
Built for Glock Gen 1-4 pistols in 10mm, .45, and .357, this sight set is aimed at shooters who want a fast, straightforward sight picture for defensive use and general range work. It pairs a ProGlo front sight with a serrated square-notch rear and green tritium in a three-dot layout, giving the set a clear, familiar presentation in low light and daylight conditions. The rear sight is designed with a square notch and black outline, while the front uses a LumiGreen outline to help the front post stand out. It also fits MOS slides, but compatibility should be confirmed against your specific pistol before installation.
Why Hunters Choose the Ameriglo
Three-dot Sight
Design provides an instant sight
Proglo Front
Sight and green tritium rear
Serrated Square-notch
Rear sight offers a clean,
Fits Glock
Gen 1-4 models in 10mm,
Compatible Mos
MOS slides for broader pistol
Key Features
- Three-dot Trooper sight set with a ProGlo front sight and serrated square-notch rear sight.
- Green tritium front and rear sights for an instant sight picture in low light.
- Fits Glock Gen 1-4 10mm, .45, and .357 models, including G20, G21, and G40.
- Compatible with MOS slides.
- Front sight features a case-hardened finish with LumiGreen outline.
- Rear sight uses a case-hardened finish with a black outline and square notch shape.
Best Used For
- Glock Gen 1-4 owners seeking a tritium sight set for 10mm, .45, or .357 models
- Hunters who want a three-dot sight picture for low-light or daylight use
- Shooters using MOS slides on compatible Glock pistols
- Users preferring a serrated square-notch rear sight with green tritium
- Those replacing sights on G20, G21, or G40 pistols with verified fitment
Specifications
| Fits Make | Glock(R) |
|---|---|
| Fits Model | Gen 1-4 10mm/.45/.357 |
| Fits Mos Slide | Yes |
| Front Blade Height | 0.165 in. (4.19mm) |
| Front Blade Width | 0.140 in. (3.56mm) |
| Front Outline Color | LumiGreen |
| Front Sight Finish | Case Hardened |
| Front Sight Style | Tritium |
| Front Tritium Color | Green |
| Overall Rear Height | 0.276 in. (7.01mm) |
| Rear Blade Height | 0.196 in. (4.98mm) |
| Rear Blade Width | 0.165 in. (4.19mm) |
| Rear Notch Shape | Square |
| Rear Notch Width | 0.165 in. (4.19mm) |
| Rear Outline Color | Black |
| Rear Sight Finish | Case Hardened |
| Rear Sight Style | 2-Dot Tritium |
| Rear Tritium Color | Green |
Pros
- Three-dot sight design provides an instant sight picture for faster alignment.
- ProGlo front sight and green tritium rear support low-light visibility.
- Serrated square-notch rear sight offers a clean, defined sight reference.
- Fits Glock Gen 1-4 models in 10mm, .45, and .357.
- Compatible with MOS slides for broader pistol setup options.
- Case-hardened front and rear sight finishes are specified in the product data.
Considerations & Trade-offs
- Designed for Glock Gen 1-4 pistols in 10mm/.45/.357, so it is not a universal sight set and fit should be verified against the listed models and MOS slide compatibility.
- The set uses a three-dot tritium layout with a ProGlo front and serrated square-notch rear, which favors a fast sight picture but may not suit shooters who prefer a different sighting style.
- Front and rear sight finishes are case hardened, but the provided data does not specify blade steel, so material details beyond the listed finishes are not verified.
- GLOCK is specifically noted as not manufacturing, authorizing, endorsing, or warranting this product, so buyers should treat the compatibility note as the key reference rather than assuming OEM backing.
Suggested Comparisons
- Pistol night sights
- Glock-compatible sight sets
- Tritium sight upgrades
- Defensive handgun sights
Suggested Accessories
- Sight installation tool
- Pistol cleaning kit
- Pistol case
- Range bag
Frequently Asked Questions
Which Glock models does the Ameriglo GL-820 Trooper fit?
The listed fit is Glock Gen 1-4 in 10mm/.45/.357, and the product data also states compatibility with G20, G21, and G40. It is marked as fitting MOS slides as well.
What sight setup does this set use?
The Trooper Series uses a three-dot design, with a ProGlo front sight and a serrated square-notch rear sight with green tritium.
What tritium colors are specified for the front and rear sights?
Both the front and rear tritium are listed as green. The front outline color is LumiGreen, and the rear outline color is black.
Are the front and rear sight dimensions provided?
Yes. The front blade width is listed as 0.140 in. (3.56mm) and the front blade height as 0.165 in. (4.19mm). The rear blade height is 0.196 in. (4.98mm), rear blade width is 0.165 in. (4.19mm), overall rear height is 0.276 in. (7.01mm), and rear notch width is 0.165 in. (4.19mm).
Is this product made, authorized, or warranted by GLOCK?
No. The product data states that it is not manufactured, authorized, endorsed, or warranted by GLOCK, and that GLOCK does not warrant or represent compatibility with GLOCK pistols.