It would be pretty handy if I could rotate these photos on the iPad....Not. Anyways, this is a M&P22 with a Vortex Razor mount adapter; works great as an alternative to my Walther P22 squirrel control device. As you probably know there are a variety of EGW adapters available.
The center of the adapter has a set screw for additional friction fit. I drilled a clearance hole for the set screw to engage below the surface of the
dovetail so it could not possibly move laterally.