This specific 3D model, "Futuristic sword Low-poly 3D model 36", is an asset made available by "Unknown author".
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OBJ (OBJ, filesize: 57.8 MB), MAX (Autodesk 3ds Max, filesize: 3.3 MB), FBX (Autodesk FBX, filesize: 19 MB), TEXTURES (Textures, filesize: 46.2 MB), GLTF (glTF, filesize: 30.6 MB)