If the buyer is oblivious to the logic stated above and needs to be shown numbers, Kuhnhausen has dimensions and tolerances for the slide and its environs. For instance, the tab height is .243" - .006" and Kuhnhausen notes the operation is tolerant of some excess clearance.
One look at Kuhnhausen clearly shows the minimum height of the guide rail at the notch is taller than the max height of the slide tab by at least .016". Of course it will come out.