This is a Hi-Viz Sight known as the Litewave, model CZLW11.
HIVIZ(R) LiteWave(R) Rear Sight for CZ pistols. Fits 75" 85 and P-01 models with fixed rear sights. Includes Green" Red and Black replaceable LitePipes.
Features:
Rear sight only
Three interchangeable LitePipes
