New today is the S&W Response, a 9mm carbine with interchangeable magazine wells. It comes with two magwells, one for S&W M&P magazines (and two 23-rd mags) and one for Glock 9mm magazines.
The trigger group is AR. The buttstock is AR (Magpul MOE). The grip looks M&P, including the backstrap system. M-lock forend.
It looks like no sights are included.
How much, when do we see it, etc? Beats me.
https://www.smith-wesson.com/product/response