TruGlo TG131ST2 TFO Tritium Fiber Optic Sight Set Sig P-Series

The TruGlo TG131ST2 TFO sight set combines tritium and fiber optic technology to deliver consistent sight picture in all lighting conditions. This dual-illumination system automatically adjusts brightness based on ambient light, eliminating the visibility problems that plague standard iron sights.

What Makes This Different

TFO (Tritium + Fiber Optic) technology sets this sight apart from single-illumination systems. While fiber optic sights fail in darkness and tritium-only sights appear dim in bright conditions, TFO sights maintain optimal brightness 24/7. The green tritium gas provides 12-year guaranteed illumination, while fiber optic rods gather available light during daylight hours.

Key Features

• Dual-illumination TFO technology with green tritium and fiber optic elements
• Machined steel construction with protective Focus-Lock ring around tritium vials
• Fits Sig Sauer P-Series pistols with #6 front and #8 rear dovetail cuts
• White outline rear sight for enhanced target contrast
• Snag-resistant profile designed for concealed carry and duty use
• Self-luminous tritium rated for 12+ years of continuous glow
• Quick target acquisition with bright green sight picture

Field performance remains consistent across diverse shooting scenarios. Competition shooters benefit from the bright fiber optic illumination during daylight matches, while the tritium ensures reliable sight picture for home defense situations. The steel construction withstands repeated holstering and environmental exposure without losing zero or brightness.

Technical Specs

• Compatibility: Sig Sauer P-Series pistols (#6 front/#8 rear dovetail)
• Construction: Machined steel with anodized finish
• Illumination: Green tritium gas + green fiber optic rods
• Tritium lifespan: 12+ years guaranteed brightness
• Sight configuration: 3-dot system with white outline rear
• Installation: Professional fitting recommended for proper windage
• Country of origin: USA

This sight set addresses the fundamental limitation of single-source illumination systems. Professional gunsmiths stock TruGlo TFO sights specifically because they eliminate customer callbacks about poor visibility performance.