$550 BM-13 Katyusha Low-poly 3D model by Shigvi. Available on CGTrader with 20493 polys and 21978 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 78.7 MB), OBJ (OBJ, filesize: 3.01 MB), FBX (Autodesk FBX, filesize: 150 MB), OTHER (Other, filesize: 70.5 MB)