I have 3 weapons in a crate, two with bipods, one without.

If I do getWeaponCargo I get [["arifle_MX_SW_pointer_F"],[3]]

If I do weaponsItemsCargo I get

[
  ["arifle_MX_SW_pointer_F","","","",[],[],"bipod_01_F_snd"],
  ["arifle_MX_SW_pointer_F","","","",[],[],""]
]

There is no way to determine the count of weapons while still being distinct on attachments.

This could be fixed with an alternative syntax for weaponsItemsCargo, for example:

weaponItemsCargo [container, includeCounts], includeCounts is false by default for backwards compatibility, but when set to true it would return

[
  [["arifle_MX_SW_pointer_F","","","",[],[],"bipod_01_F_snd"], 2],
  [["arifle_MX_SW_pointer_F","","","",[],[],""], 1]
]