I'll clarify. I do my assembly method similar to how Hilton Yam shows here:
When assembling, the guide rod mates to the bottom of the barrel's lower lug. And when the slide is on the frame, and fully assemble w/ the slide stop, it will mate to both the barrel's lower lug and the cut out on the frame and dust cover area.
When cycling, the guide stays in place on the frame, and will ride along the bottom of the barrel.