I think that picture is just an example of what he'd like to accomplish: SoLow. The same name with different spellings tripped me up too.
Jon, note that many people have had to fit the SoLows to their receiver so it can be mounted to the frame, myself included. It is easily done by lightly filing the bottom of the fingers down. Test-install the optics with the SoLow and try to assemble the frame. If it goes together with no additional force, you're golden. If not, you'll need to make the slight mods, just look where the interference is to tell you where to file. There are a couple recent threads detailing this, or you can post if you need more help.
