The ever evolving M&P9... I was not a fan of the sloping rear sight shape of the Trijicons that came on the gun, so I figured I'd hit two birds with one stone and try out a more simplified sight picture while I'm at it. 10-8 Performance makes some outstanding accessories for various guns, and their M&P Rear Sight fit the bill for everything I'm looking for. Plain black, with serrations to cut down on glare, and I'm a fan of the theory of the U-notch. Plus it has a good front edge for one-handed manipulations, something the sloping Novak style ramp lacks.
Range report and whatnot to follow.