Magazine hit ammunition store (9,4)

I believe the answer is:

cartridge belt

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'ammunition store' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'magazine hit' is the wordplay.
'magazine' becomes 'cartridge' (I've seen this before).
'hit' becomes 'belt' (belting is a kind of hitting).
'cartridge'+'belt'='CARTRIDGE-BELT'

Can you help me to learn more?

(Another definition for cartridge belt that I've seen is " where slugs collected?".)

I've seen this clue in The Daily Express.

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