{
  "materials": [
    {
      "item": {
        "item": "minecraft:iron_ingot"
      },
      "count": 2
    },
    {
      "item": {
        "item": "minecraft:coal"
      },
      "count": 2
    }
  ],
  "result": {
    "type": "ammo",
    "id": "emxarms:339x57",
    "count": 64
  }
}