Why people call Mags clips?

[AdAstra2009]

Originally Posted by Evil Tim

Well, it's more that someone who uses a weapon for a living doesn't really have to care too much about what the correct terms are for the various bits of it. For, say, the guy at the depot trying to work out if the guys on the front want thirty cases of preloaded mags or thirty cases of stripper clips, then it's a bit more of an issue. (Let's not even get into things like what ground crews think of pilots' knowledge of their aircraft).

Never heard of preloaded mags coming straight from the depot.

I'm playing devil's advocate and yeah it's incorrect practice to call a mag a clip.
I just think it's obnoxious to snap on someone for something small like that.