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The "Governor" is a six-shot revolver with a Scandium frame and stainless steel cylinder that can shoot .410 (shotshell), .45 Auto, and .45 Colt:
This is the SD9 (the SD40 was also on display):
Many people have been waiting for the M&P 22:
Note that the frame is made by Walther, which suggests that a .22LR conversion unit for the M&P Series will not be available.
This is the first time I have seen a SW1911 (a SW1911SC, in this case) with a Bobtail: