This is a Hi-Viz Sight known as the Litewave, model RHLW01.
HIVIZ(R) LiteWave(R) Front Sight for Ruger Redhawk revolvers. Fits Redhawk and Super Redhawk models with spring plunger retained front sight" as well as Super Blackhawk Hunter revolvers. Includes Green" Red and White replaceable LitePipes.
Features:
Interchangeable Litepipe front sight
Includes green red and white LitePipes;.090 diameter
