[
  {
    "type": "item_group",
    "id": "ammo_can_belt40mm_full",
    "container-item": { "item": "ammunition_can_pa120", "variant": "ammunition_can_pa120_40x53_32" },
    "//": "add some foam to fill the thing?",
    "items": [ { "item": "belt40mm", "count": 1, "charges": 32 } ]
  }
]
