That most likely isn't going to happen. It would require an entirely new frame size complete with the costs of R&D, and seeing as they've been having a hard enough time working the bugs out of the M&P10 as it is, it seems unlikely that they'd want to develop an all-new 10mm pistol in the SD Series.

Also, it's important to note that the SD Series, even in it's latest 2.0 iteration, is still based on the design of the original Sigma Series, ergo S&W hasn't developed an entirely new design in this line of pistols since it was originally released in 1994.

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Shooting Comfort is bilateral.