[
  {
    "type": "item_group",
    "id": "milspec_arsenal_atgm_gun",
    "subtype": "collection",
    "items": [
      { "item": "atgm_launcher", "prob": 80 },
      { "item": "atgm_launcher", "prob": 20 },
      { "item": "atgm_heat", "prob": 60 },
      { "item": "atgm_heat", "prob": 60, "count": [ 1, 2 ] },
      { "item": "atgm_heat", "prob": 30, "count": [ 1, 2 ] }
    ]
  }
]
