$5 3D model of a helmet with a visor 3D model by tung14726492. Available on CGTrader with 748017 polys and 451760 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 117 MB), OBJ (OBJ, filesize: 117 MB), MAX (Autodesk 3ds Max, filesize: 117 MB), FBX (Autodesk FBX, filesize: 117 MB), JPG (JPG, filesize: 58.7 MB), DAE (Collada, filesize: 58.7 MB)