For complete workflow compatibility, we recommend downloading the source format.The viewer version is intended for web viewing only. In the source file, the following are fully preserved:✔ original scene hierarchy✔ complete materials without reduction✔ correct PBR texture maps✔ correct object namesIf you are going to integrate the model into a project, choose the Original format.Fairbairn Sykes fighting knife is a double edged fighting knife resembling a dagger or poignard with a foil grip.