ammo belt ->
ammunition belt
because
ammo is already aliased to
ammunition
Uncertain if it should also imply “ammunition” because I suppose such a belt could be empty?
Not the same thing as a
bullet belt which can be a nonfunctional fashion item AFAIK.
Also uncertain how
bandolier fits in - a bullet belt would be a kind of bandolier, but may not be worn the same way, so an implication may or may not be appropriate…
Bonus:
Merge
bandoleer and
bandolier - 20 seconds on Google seems to indicate both are accepted spellings.