What does the magazine button do? Why, it STOPS the magazine in the grip as its primary function. It's secondary function is to RELEASE the magazine. It's always called a mag release; never a mag stop.

What does a slide STOP do? Its first function is to lock the slide back, but not permanently. It must also by design be able to RELEASE the slide as it's second function. People argue that this dual function lever can only be called one thing.

Eh. Semantics. No matter your terminology--slide lever; slide lock; slide stop; slide release. All this nomenclature describes the function of the part. I know to which part you are referring. My panties aren't in a bunch.

But it if you call a mag release a mag stop, you are just flat wrong! :-))