If you're looking for the ultimate upgrade for your Sig Sauer P-Series pistol, then the HIVIZ LiteWave Fiber Optic Rear Sight is the perfect choice. This rear sight is designed to provide the highest level of accuracy, giving you the edge when you need it most. HIVIZ® LiteWave® Rear Sight for Sig Sauer P-Series Pistols. Fits all P-Series pistols with fixed rear sights; does not fit the P-320 and P-250. Includes Green, Red and Black replaceable LitePipes.