Our Smith and Wessson M&P series sights are designed as a direct replacements for factory M&P sights. (Full size, compact, Shield, etc.)
The California compliant M&P shield models feature a loaded chamber indicator (LCI). This LCI partially obscures the sight picture of the factory sights. TRUGLO sights are based on the height of the factory sights (to fit standard holsters, etc.) and experience the same issue.
There is not currently a California specific sight model to circumvent the issue of the LCI partially obscuring the front sight.