Check out Robot Spine Free 3D model on CGTrader for free. High-quality mesh by Henrich-Kimerling: 34440 polys, 17827 vertices. Rigged, Animated, PBR.
MAX (Autodesk 3ds Max, filesize: 70.3 MB), OBJ (OBJ, filesize: 70.3 MB), FBX (Autodesk FBX, filesize: 70.3 MB), UNITYPACKAGE (Unity 3D, filesize: 70.3 MB)