Hiviz Fastdot H3 Sight Set for Glock - GLFD21, Fits Glock 9mm, S&W .40, .357 SIG
$125.00
$175.00
(You save
$50.00
)
- Firearm Group:
- Handgun
- Firearm Make Fit:
- Glock
- Finish-Color:
- Black
- Frame Material:
- Steel
- Front Color:
- Red
- Front Material:
- Fiber Optic
- Rear Color:
- Green
- Rear Material:
- Tritium
- Firearm Fit:
- Glock 9/40/357sig
The Hi-Viz Fastdot H3 sight set for Glock brings a hybrid illumination approach to your carry or duty pistol. This low-profile front and rear sight combination pairs fiber optic and tritium technology, giving you bright, reliable visibility whether you're shooting in daylight or low light. The red front sight pairs with a green rear sight—a color contrast that many shooters find intuitive for quick target acquisition. Since both light sources work together, you get consistent sight picture from dawn through night without battery dependence.
Built entirely of steel and engineered to the Fastdot profile, these sights integrate with standard holsters without requiring modifications. The tritium is factory-encapsulated for durability and safety, and the fiber optic element harvests ambient light to stay bright even in overcast conditions or shadow. This makes the H3 a practical choice for Glock owners who want dependable sights for range work, self-defense training, or carry without overthinking transitions between lighting scenarios.
Fit and function matter in a sight upgrade. The Fastdot H3 mounts directly to Glock pistols chambered in 9mm, .40 S&W, and .357 SIG, meaning if you run one of these common calibers, installation is straightforward. The low-profile design keeps your gun sleek and prevents snags. Whether you're refining your carry gun or building a reliable trainer, these sights reward deliberate, repeatable sight pictures.
Key Features
- Dual illumination: fiber optic and tritium for 24-hour visibility
- Red front sight, green rear sight for fast contrast recognition
- Low-profile steel construction fits standard holsters
- Encapsulated tritium for durability and safety
- Compatible with Glock 9mm, .40 S&W, and .357 SIG models
Specifications
| Brand | Hi-Viz |
| Model | Fastdot H3 (GLFD21) |
| Sight Type | Front and rear sight set |
| Illumination | Fiber optic and tritium |
| Front Sight Color | Red |
| Rear Sight Color | Green |
| Material | Steel |
| Profile | Low profile |
| Compatibility | Glock 9mm, S&W .40, .357 SIG |
Frequently Asked Questions
What Glock models does the Fastdot H3 fit?
The Fastdot H3 is compatible with all Glock pistols chambered in 9mm, .40 S&W, and .357 SIG.
How does the dual illumination system work?
The sights combine fiber optic and tritium technology. The fiber optic element collects ambient light for brightness in daylight and moderate low-light conditions, while the encapsulated tritium provides continuous glow in complete darkness, ensuring your sight picture remains visible 24 hours a day.
Will these sights work with my standard holster?
Yes. The Fastdot H3 features a low-profile design engineered to fit standard Glock holsters without modification.
What's the difference between the red front and green rear sight?
The red front sight and green rear sight create color contrast that many shooters find speeds up target acquisition and sight alignment. This contrasting pair is designed for quick, intuitive sight picture under varied lighting.
