Rival Arms RA4B231G MOS Night Sights Glock 17/19 Green Tritium

The Rival Arms RA4B231G In-Line MOS Night Sights deliver enhanced target acquisition in low-light conditions for Glock 17 and 19 pistols equipped with MOS (Modular Optic System) configurations. These tritium-powered sights maintain consistent visibility across all lighting conditions while providing precise sight alignment through their white outline design.

What Makes This Different

Unlike standard plastic sights, the RA4B231G features self-illuminating green tritium inserts that glow continuously for up to 12 years without batteries or external power sources. The white outline surrounding each tritium vial creates a high-contrast sight picture that remains visible in daylight while the tritium core provides illumination in darkness. This dual-visibility system eliminates the transition period between day and night shooting scenarios that plague many alternative sight systems.

Key Features

• Green tritium inserts rated for 12-year continuous illumination
• White outline design for enhanced contrast in all lighting conditions
• Direct compatibility with Glock MOS mounting system
• Machined steel construction with corrosion-resistant finish
• In-line sight configuration maintains factory sight radius
• Drop-in installation requires no permanent modifications
• Fits standard Glock holsters without interference

Field performance demonstrates reliable target acquisition from bright sunlight through complete darkness. The green tritium spectrum provides optimal visibility for human eyes while the white outlines ensure rapid sight alignment during defensive scenarios. Law enforcement and competitive shooters report consistent performance across temperature ranges from -20°F to 140°F, with the tritium maintaining brightness regardless of environmental conditions.

Technical Specs

• Compatibility: Glock 17, Glock 19 with MOS system
• Front sight height: Standard MOS specification
• Rear sight height: Standard MOS specification
• Tritium color: Green (both front and rear)
• Outline color: White photoluminescent paint
• Construction: Machined steel with protective coating
• Tritium lifespan: 12 years minimum brightness
• Installation: Drop-in replacement for MOS factory sights

The RA4B231G represents a practical upgrade for Glock MOS owners seeking reliable low-light capability without electronic complexity. Professional-grade tritium technology combined with proven steel construction ensures consistent performance when accuracy matters most.