AmeriGlo Cap Green Sight Set for Glock 20/21
AmeriGlo
$63.69
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AmeriGlo
AmeriGlo Cap Green Sight Set for Glock 20/21
The AmeriGlo CAP (Combat Application Pistol) Green Tritium Sight Set for Glock 20/21 delivers lightning-fast target acquisition by combining a glowing tritium front post with a bold horizontal LumiGreen paint bar on the rear — engineered for shooters who demand reliability in any lighting condition.
- Green tritium front sight glows continuously — no batteries or light needed
- Square .140" wide LumiGreen outline front sight for crisp, precise alignment
- Flat black rear sight features a .155" wide square notch for reduced visual clutter
- Horizontal LumiGreen paint stripe under rear notch enables rapid horizontal alignment
- Point of impact set to the A-Box at 15 yards for instinctive combat shooting
- Designed specifically for Glock 20 and Glock 21 full-size pistols
Who This Is For
The AmeriGlo CAP sight set is ideal for concealed carriers, law enforcement officers, and defensive shooters who need to get on target fast — especially in low-light environments. If you carry a Glock 20 or 21 and want night sights that prioritize speed without sacrificing practical accuracy, this set delivers a proven combat-focused sight picture right out of the box.
Specifications
| Brand | AmeriGlo |
|---|---|
| Model | CAP (Combat Application Pistol) |
| Compatible Firearms | Glock 20, Glock 21 |
| Front Sight | Green Tritium, .140" wide, square LumiGreen outline |
| Rear Sight | Flat black, .155" wide square notch |
| Rear Sight Feature | Horizontal LumiGreen paint stripe under notch |
| Point of Impact | A-Box at 15 yards |
| Tritium Color | Green |
| Installation | Requires sight pusher or gunsmith recommended |
| Country of Origin | USA |
Frequently Asked Questions
Will these sights fit my Glock 20 or Glock 21 without modification?
Yes — the AmeriGlo CAP sight set is specifically engineered to fit the Glock 20 and Glock 21 platforms. No frame modification is required. However, installation typically requires a sight pusher tool or the assistance of a qualified gunsmith to seat the rear sight properly in the dovetail.
How does the CAP sight system work for fast target acquisition?
The CAP system simplifies sight alignment by pairing a glowing tritium front post with a horizontal LumiGreen paint stripe on the rear sight. Rather than needing perfect three-dot alignment, you simply place the front post above the rear stripe and engage your target. Point of impact is calibrated to the A-Box at 15 yards whenever any portion of the front sight is visible in the rear notch, making this system ideal for high-stress defensive situations.
How long will the tritium in these sights remain effective?
AmeriGlo uses high-quality tritium vials that provide self-luminous glow for approximately 12 years before the brightness noticeably decreases. The sights will continue to function as standard sights after that period, but the self-illumination will gradually fade. Most manufacturers, including AmeriGlo, recommend replacing tritium sights every 10–12 years for optimal low-light performance.
