I guess it was inevitable.

Instead of a SHOT Show unveiling, Smith & Wesson waited until mid-May and the NRAAM to drop their newest offering, a .45ACP addition to the M&P Shield line of single-stack subcompacts:

Shown here with the flush-fit six-round magazine in the paw of your faithful correspondent, the .45 Shield is practically indistinguishable, size-wise, from the 9mm/.40 version unless the two are side-by-side. Smith has pictures. It's distinctly slender-er than its most obvious rival, the Glock 36. I'd have to see it next to a Kahr P45 to be certain, but I'd say they're roughly comparable in size.

SayUncle hand-models for you here, with the seven-round extendo. Smith claims a weight only a few ounces more than a classic Model 36 Chief's Special J-frame. I have not verified this.
.
.