The XS Sights Big Dot Tritium Sight (model RV-0003N-3N) is a front sight for the S&W J-Frame and Ruger SP101 (fixed rear) revolvers, using a large, high-contrast orange Big Dot that measures 0.188 inches.

Key Specifications

• Illumination: Tritium-powered front sight
• Dot Size: Big Dot, 0.188 in. (vs. 0.140 in. standard dot)
• Color: High-contrast orange
• Glow Feature: Photoluminescent glow dot absorbs ambient light for low-light glow
• Construction: Durable CNC-machined steel
• Fitment: S&W J-Frame and Ruger SP101 (fixed rear)
• Warranty: 10-year warranty, 30-day satisfaction guarantee
• Manufacturer: XS Sights

Frequently Asked Questions

How much bigger is the Big Dot than a standard front sight dot?
XS’s Big Dot measures 0.188 inches, noticeably larger than its own 0.140-inch Standard Dot option, for faster target pickup at the cost of some precision.

Does this sight glow in low light without a flashlight?
Yes, the photoluminescent glow dot absorbs ambient light during the day and glows on its own in low light, in addition to the tritium illumination.

Buy the XS Big Dot Tritium Front Sight Today

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