Check out Special forces helmet Low-poly 3D model on CGTrader for $6. High-quality Polygon mesh mesh by hilidia99: 130456 polys, 70463 vertices.
BLEND (Blender, filesize: 32.1 MB), OBJ (OBJ, filesize: 2.32 MB), FBX (Autodesk FBX, filesize: 3.83 MB), STL (Stereolithography, filesize: 3.44 MB)