25 Pounder (Polygon mesh 3D model) is available on CGTrader for $50. Original author: Plutonius3d. Specs: 5718 polys, 3507 verts.
STL (Stereolithography, filesize: 88.7 KB), OBJ (OBJ, filesize: 140 KB), MAX (Autodesk 3ds Max, filesize: 146 KB), 3DS (3D Studio, filesize: 87.3 KB)