TruGlo Brite-Site TFO Tritium/Fiber Optic Sight TG-TG131GT1 (also known as the TruGlo TFO Green/Green Low Profile Sight Set for Glock).
This is a popular Tritium + Fiber Optic (TFO) night sight set from TruGlo's Brite-Site series. It combines bright fiber-optic illumination for daylight/low-light conditions with self-powered tritium capsules for true 24/7 visibility, creating a consistent sight picture day or night without batteries. The "Green/Green" configuration (green front and green rear) provides a traditional three-dot pattern that many shooters prefer for quick target acquisition.
Key Features & Specs
- Illumination Technology: Patented TFO system — fiber optics gather ambient light for exceptional brightness in daylight or indoor settings, while sealed Swiss tritium vials glow in complete darkness (no light charging required). The tritium has a long half-life for reliable performance over years.
- Sight Picture: Green fiber-optic/tritium front dot paired with green rear U-notch (square-notch style). Provides high contrast and fast focus on the front sight. Concealed fiber design prevents the target from seeing the bright elements.
- Profile: Low "square-notch" fixed sights — snag-resistant design that fits most standard holsters without modification.
- Construction: CNC-machined steel with TruGlo's Fortress Finish™ (black nitride protective coating) for maximum durability, corrosion resistance, and wear protection.
- Compatibility: Designed for Glock models including:
- Full-size/compact: 17, 17L, 19, 19X, 22, 23, 24, 26, 27, 33, 34, 35, 38, 39, 45 (and similar Gen 1–5 models).
- Excludes MOS/optic-ready models in most cases (confirm for your specific pistol).
- Some listings note compatibility with certain Sig Sauer models as well, but it is primarily a Glock-specific set.
- Additional: Assembled in the USA. 12-year limited warranty on the tritium. Easy drop-in installation for most users (professional installation recommended for dovetail fitting if needed).
The TG-TG131GT1 excels at providing unmatched visibility across all lighting conditions — fiber optics shine in bright or transitional light, while tritium ensures the sights remain visible in total darkness. Users frequently praise the bright, crisp sight picture, improved accuracy/speed, and rugged Fortress finish that holds up to daily carry and range use.
Who It's For
- Glock owners wanting a reliable upgrade from factory plastic sights for concealed carry, home defense, or range shooting.
- Shooters who prefer a traditional green three-dot system with 24/7 illumination.
- Anyone seeking a balance of daytime fiber-optic brightness and nighttime tritium glow without the higher cost of premium TFX PRO or similar sets.
