The only flat dark earth M&P pistol on the roster that I know of is the M&P45 w/ Thumb Safety.
We do not currently offer SSE on Smith and Wesson pistols.
For more information, here is a link to the complete California "Safe Handgun" Roster.
M&P 45 (Mag/Thmb Sfty) Dk Earth Bro
SKU 109056 / Stainless Steel, Polymer