{
    "forge_marker": 1
    "defaults": {
        "model": "<handle model>"
    },
    "variants": {
        "inventory": [{
            "submodel": {
                "left": {
                    "model": "<sidemodel>",
                    "transform": <arbitrary trsr>
                },
                "right": {
                    "model": "<sidemodel>",
                    "transform": <arbitrary trsr>
                }
            }
        }]
    }
}