$10.78 Tank Cannon Low-poly 3D model by 3DHaupt. Available on CGTrader with 2677 polys and 2039 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 197 KB), OBJ (OBJ, filesize: 318 KB), TEXTURES (Textures, filesize: 54.5 MB), OTHER (Other, filesize: 354 KB), FBX (Autodesk FBX, filesize: 199 KB), 3DS (3D Studio, filesize: 92.3 KB), DAE (Collada, filesize: 508 KB), BLEND (Blender, filesize: 1.01 MB)