Hi-Viz FastDot H3 Night Sight Set Sig P320 P365 9mm
Hi-Viz
$117.69
(No reviews yet)
Write a Review
Hi-Viz
Hi-Viz FastDot H3 Night Sight Set Sig P320 P365 9mm
The HiViz FastDot H3 brings cutting-edge dual-illumination technology to your Sig Sauer P320 or P365, delivering a precise, always-visible aiming point whether you're on the range at high noon or defending your home at 3 a.m.
- Combines fiber optic and tritium for reliable 24-hour illumination
- Bold red front sight snaps to target fast under any lighting
- Green tritium rear sight creates clear, high-contrast sight picture
- Low-profile design minimizes snag risk during concealed carry draw
- Tritium vials backed by an industry-leading 12-year warranty
- Fits Sig P320 and P365 chambered in 9mm with fixed sights only
Who This Is For
The HiViz FastDot H3 is ideal for Sig P320 and P365 owners who demand a reliable, no-compromise sight upgrade for everyday carry, home defense, or duty use. If you rely on your pistol around the clock and need a sight that performs in total darkness just as well as in broad daylight — without the bulk of a red dot optic — this drop-in tritium/fiber optic combo is built for you. Note: compatible with fixed-sight, non-optic-ready models only.
Specifications
| Brand | HiViz |
|---|---|
| Model | FastDot H3 |
| Compatible Pistols | Sig Sauer P320, P365 |
| Caliber | 9mm |
| Sight Configuration | Fixed sights only (non-optic-ready) |
| Front Sight | Red Fiber Optic / Tritium |
| Rear Sight | Green Tritium |
| Illumination | 24-hour (day & night) |
| Tritium Warranty | 12 Years |
| Profile | Low Profile |
| Installation | Drop-in replacement |
Frequently Asked Questions
Will these sights fit my optic-ready (OR) Sig P320 or P365?
No. The HiViz FastDot H3 is designed specifically for Sig P320 and P365 models equipped with standard fixed sights. It is not compatible with optic-ready (OR) slides, which use a different rear sight cut and mounting system. If you're unsure which configuration you have, check your slide for a rear optic mounting plate — if one is present, your pistol is optic-ready and this sight set will not fit.
How does the dual fiber optic and tritium system work?
The FastDot H3 uses HiViz's LitePipe fiber optic technology to gather and concentrate ambient light during the day, producing a vivid, high-visibility aiming dot. When light levels drop, the self-luminous tritium vials take over, providing a bright glow with no batteries or external light source required. The result is seamless 24-hour performance across all lighting conditions.
How long will the tritium remain bright, and is it warrantied?
Tritium is a radioactive gas that naturally dims over time — typically over a 12-year half-life. HiViz backs the tritium vials in the FastDot H3 with a full 12-year manufacturer's warranty, one of the longest in the industry, giving you confidence that your sights will stay mission-ready for years of carry and service use.
