Pressing down on the slide stop of Glocks will impart wear to them as the slide has a sharp edge (steel) and the slide stop is aluminum.
Best method is to replace magazine is to pull slide slightly to the rear and release. If you need to lower the slide on an empty chamber, remove magazine, pull slide to rear slightly and then depress the slide stop while allowing the slide to come forward.

Last edited by WStrayer; 04/01/20.