I know all the M&Ps have stainless slides, I just think it looks good with the two tone and not darkened. I too have seen Pro Series two tones but this is the first regular M&P I've seen done this way. I have a feeling it may be an exclusive for CDNN. Well checking on the availability at my local dealer, I saw a listing for another interesting version called a VTAC with a FDE finish on both the slide and frame and special sights. S&W is coming out with some great additions to the M&P line.