mc_rebalance_datapack/data/tetra/modules/crossbow/basic_stock.json

{
    "variants": [
        {
            "materials": [ "tetra:wood/", "tetra:rod/stick", "tetra:metal/" ],
            "key": "basic_stock/",
            "extract": {
                "availableTextures": [ "default", "tconstruct" ],
                "models": [
                    {
                        "location": "tetra:item/module/crossbow/stock/basic/",
                        "type": "static"
                    }
                ]
            }
        }
    ]
}