Futuristic Mecha Sentinel is created by DIASAI. I just edited a few details to make it comfortable to work in Blender.
STL (Stereolithography, filesize: 31.8 MB), OBJ (OBJ, filesize: 33.6 MB), GLTF (glTF, filesize: 32.4 MB), PNG (PNG, filesize: 28.7 MB), BLEND (Blender, filesize: 39.8 MB), FBX (Autodesk FBX, filesize: 35.2 MB)