[RetiredNavy]

I've never seen a glock clip, lots of glock magazines but never a clip. Is that a special order modification?

[Richard Kimball]

I was under the impression that the terms "clip" and "magazine" were interchangeable, as per the Merriam-Webster dictionary,

2 : a device to hold cartridges for charging the magazines of some rifles; also : a magazine from which ammunition is fed into the chamber of a firearm

I've been wrong before, though.