Use away, I'll take whatever solves the problem.

The tap never touches the frame. The slide stop won't go in far enough for that to happen. That tab is what appears to engage the slide notch, since the stop sets out so far from the frame. If that's the case it appears to have worked for a while until the tab became too worn and here we are. This part appears identical to a slide stop posted by a member of another forum for a 4516. I wonder if there are differences and this is the wrong one for a 4506 no dash?