$7 Winchester 1897 Low-poly 3D model by altubeestudio. Available on CGTrader with 4945 polys and 8746 vertices. Check it out on CGHub.
C4D (Cinema 4D, filesize: 1.11 MB), OBJ (OBJ, filesize: 1.06 MB), FBX (Autodesk FBX, filesize: 295 KB), 3DS (3D Studio, filesize: 283 KB)