The TruGlo TG131NT4 TFO sight set combines tritium and fiber optic technology to deliver consistent target acquisition in any lighting condition. This dual-illumination system ensures shooters maintain sight picture clarity from bright daylight through complete darkness.
What Makes This Different
The TFO (Tritium Fiber Optic) design integrates Swiss tritium vials with fiber optic rods in a single sight housing. While standard night sights rely solely on tritium glow or fiber optics work only in daylight, this hybrid system automatically adjusts to available light. The fiber optics gather ambient light during day shooting, while tritium provides consistent illumination for up to 12 years in low-light scenarios.
Key Features
- Dual-illumination system with Swiss tritium and fiber optic technology
- Green front and rear sight configuration for fast target acquisition
- Machined steel construction with protective sight guards
- Fits 1911 Officer and Commander models with standard dovetail cuts
- Self-luminous tritium rated for 12-year lifespan
- Snag-resistant low-profile design for concealed carry
- No batteries or external power source required
Range testing demonstrates consistent sight picture transitions from indoor to outdoor environments without adjustment periods. Competition shooters benefit from the bright fiber optic gathering during daylight stages, while law enforcement and concealed carry users rely on tritium visibility during low-light scenarios. The steel construction withstands repeated holstering and environmental exposure without losing zero.
Technical Specs
- Compatibility: 1911 Officer and Commander frames
- Sight configuration: Green front dot, green rear dots
- Construction: Machined steel with protective guards
- Tritium source: Swiss-made vials, 12-year rating
- Installation: Standard dovetail mounting
- Profile: Low-profile snag-resistant design
- Finish: Matte black oxide coating
The TG131NT4 addresses the limitation of single-technology sights by providing reliable illumination across all shooting conditions. Professional installation ensures proper sight alignment and zero retention for immediate deployment.