Hi-Viz FastDot H3 Iron Sights for Glock 9mm/.40/.357
Hi-Viz
$117.69
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Hi-Viz
Hi-Viz FastDot H3 Iron Sights for Glock 9mm/.40/.357
The HiViz FastDot H3 for Glock 9mm/.40 S&W/.357 SIG delivers a revolutionary tritium and fiber optic hybrid sight system that gives you a fast, precise aiming solution in any lighting condition — from bright daylight to complete darkness.
- H3 tritium vials glow continuously without batteries or light activation
- Fiber optic front sight captures ambient light for brilliant daytime visibility
- FastDot design aligns your eye naturally for rapid target acquisition
- Fits Glock pistols chambered in 9mm, .40 S&W, and .357 SIG
- Durable steel construction withstands heavy defensive and range use
- Drop-in installation compatible with standard Glock sight dimensions
Who This Is For
The HiViz FastDot H3 is ideal for concealed carry holders, home defenders, and competitive shooters who demand a reliable sight that performs equally well during a sunny afternoon range session or a low-light self-defense scenario. If you rely on your Glock as a serious defensive tool and want a genuine upgrade over factory plastic sights, this tritium-fiber optic hybrid is one of the most versatile and proven options on the market.
Specifications
| Brand | HiViz |
|---|---|
| Model | FastDot H3 |
| Compatible Calibers | 9mm, .40 S&W, .357 SIG |
| Compatible Platform | Glock (Standard Frame) |
| Sight Technology | H3 Tritium + Fiber Optic Hybrid |
| Tritium Vial Life | ~12 years |
| Front Sight | Fiber Optic with Tritium Insert |
| Rear Sight | Tritium Night Sight |
| Material | Steel |
| Installation | Drop-In (Standard Glock Dimensions) |
| Country of Origin | USA |
Frequently Asked Questions
Which specific Glock models are compatible with the FastDot H3?
The HiViz FastDot H3 is designed to fit Glock pistols chambered in 9mm, .40 S&W, and .357 SIG. This covers popular models including the Glock 17, 19, 22, 23, 31, 32, and their variants. Always verify your specific generation and model against HiViz's compatibility chart before ordering, as some Glock MOS or long-slide variants may require a different fit.
How does the H3 tritium element work, and how long will it last?
H3 tritium is a self-luminous radioactive isotope sealed inside a glass vial that emits a constant green glow without any need for batteries, charging, or exposure to light. Tritium vials have a half-life of approximately 12 years, meaning your sights will remain effectively visible in low-light and no-light conditions for well over a decade of normal use — making them an excellent long-term investment for any defensive firearm.
Can I install the FastDot H3 sights myself, or do I need a gunsmith?
Many experienced Glock owners install aftermarket sights at home using a basic sight pusher tool or a nylon-tipped punch and bench block. However, Glock sights can be tight and require steady, controlled pressure to avoid damaging the slide. If you are not comfortable working on your firearm, a qualified gunsmith can typically install a set of aftermarket sights quickly and affordably, ensuring proper seating and zero.
