St on a s&w m&p 9 2.0 compact optic ready - Vortex Defender-ST 1x23mm Reflex Red Dot Sight

Picked the ST over the CCW since the frame of this pistol is a little larger than a concealed carry and nothing wrong with having a larger window to look through. Take your time mounting it and check all the screw options you will have. The ST comes with a wide assortment of screws with the bags labeled for size and which brand they will fit. The M&P comes with its own assortment of screws and multiple mounting plates. I ended up using the M&P hardware. The #6 mounting / spacer plate and the type B screws. These screws are a little longer than the Vortex recommended screws and having a few more threads in the hole is good for me. I also triple checked to make sure the screws did not protrude into the slide opening when installed and torqued. The only down side of this ST is the awkward battery position and it’s not an enclosed emitter. But for more $, Vortex makes that style Defender too!