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