TruGlo TG131ST1 TFO Tritium Fiber Optic Sight Set Sig P-Series

The TruGlo TG131ST1 TFO sight set combines tritium and fiber optic technology to deliver 24-hour visibility for Sig Sauer P-Series pistols. This dual-illumination system automatically transitions from fiber optic brightness during daylight to tritium glow in complete darkness.

What Makes This Different

TFO (Tritium Fiber Optic) technology sets this sight apart from single-illumination systems by providing consistent visibility regardless of lighting conditions. While standard tritium sights fade in bright light and fiber optic sights disappear in darkness, the TG131ST1 maintains optimal brightness throughout the day-night cycle. The Swiss tritium inserts are rated for 12-year continuous illumination, while the fiber optic elements gather available light for enhanced daytime performance.

Key Features

• Dual-illumination TFO technology with tritium and fiber optic elements
• Green front and rear sight configuration for consistent sight picture
• Precision-machined steel construction with protective coating
• Direct fit for Sig Sauer P-Series pistols with #8 front and rear dovetails
• Swiss tritium inserts rated for 12-year lifespan
• Shock-resistant design tested to 1,000 G-force impact
• White outline rear sight for enhanced target contrast

The sight set performs consistently across varied shooting scenarios, from competitive shooting where split-second target acquisition matters to defensive applications requiring reliable low-light performance. The green tritium maintains visibility in complete darkness while the fiber optic elements provide bright sight picture during daylight hours. Weather-sealed construction protects against moisture and debris infiltration.

Technical Specs

• Compatibility: Sig Sauer P-Series pistols (#8 dovetail front/rear)
• Illumination: Green tritium with fiber optic overlay
• Construction: Machined steel with protective finish
• Tritium rating: 12-year continuous illumination
• Impact resistance: 1,000 G-force tested
• Installation: Standard dovetail mounting (gunsmith recommended)
• Country of origin: USA

The TG131ST1 represents proven sight technology engineered for serious shooters who demand consistent performance. Professional installation ensures proper sight alignment and zero retention under recoil stress.