This is a Hi-Viz Sight known as the Litewave, model SR22.
HIVIZ(R) LiteWave(R) Front Sight for Ruger SR22 pistols. Fits models with adjustable rear sight. Includes Green" Red and White replaceable LitePipes.
Features:
Interchangeable Litepipe design
Includes green red and white LitePipes;.090 diameter
Front sight
