Meprolight Tru-Dot sights are up to 20% brighter than other tritium sights. The front dot is slightly brighter than the rear sight to help the shooter focus on the target. Light tubes are sealed with a patented bonding process that makes them impervious to solvents and oils. Tru-Dot sights have a 10-year illumination warranty.
This sight is for J-Frame revolvers with a pinned front sight. It should be filed to fit if needed, and then drilled for a cross pin. Gunsmith installation is recommended.
Tritium inserts provide light for low-light shooting
These are the green tritium lamps
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