Frizzellr is correct. Think of it this way; a CLIP feeds a MAGAZINE, and a MAGAZINE feeds the chamber. A magazine can be detachable (like an M16,AK-47), fixed (like the SKS), internal (like the M1 Garand), external (M16,M14) , blind (Remington M700ADL), hinged (M700BDL),
I suspect that the reason the manufacturers use the incorrect terminology if because the term "clip" has been misused by the ignorant to mean "magazine" for so long that they got tired of getting calls and emails from people asking about why their site doesn't list "clips" for their rifle. To save time and money, they had to cater to the least common denominator and use the incorrect term to describe the parts they offer.
They say a picture's worth 1000 words, so here's a bunch of pictures to clear this issue up:
This is a clip (stripper clip for SKS/AK-47 rifles):
which feeds the (fixed) magazine on this rifle (the SKS):
Magazine (M16/AR-15):
Clip (for the M1 Garand):
Magazine (M700BDL):
A clip loading a mazagine (Steyr Mannlicher M95/30 rifle):
Any questions?
Mike