Check out WZ-10 Attack Helicopter V01 Low-poly 3D model on CGTrader for $69. High-quality Polygon mesh mesh by Dreamscape: 13567 polys, 7490 vertices. Rigged, Textured, UV Mapped.
STL (Stereolithography, filesize: 503 KB), OBJ (OBJ, filesize: 547 KB), DWG (AutoCAD, filesize: 531 KB), DXF (DXF, filesize: 524 KB), OTHER (Other, filesize: 1.45 MB), LWO (Lightwave, filesize: 441 KB), DAE (Collada, filesize: 468 KB), 3DS (3D Studio, filesize: 404 KB), SKP (Sketchup, filesize: 1.27 MB), 3DM (Rhinoceros 3D, filesize: 517 KB), MAX (Autodesk 3ds Max, filesize: 484 KB)