Rusted D-30-122mm-Howitzer 3D model is available on CGTrader for $49. Original author: support-7. Specs: 56205 polys, 57385 verts.
BLEND (Blender, filesize: 86.7 MB), OBJ (OBJ, filesize: 7.79 MB), FBX (Autodesk FBX, filesize: 3.04 MB), DAE (Collada, filesize: 15.5 MB), STL (Stereolithography, filesize: 5.34 MB), TEXTURES (Textures, filesize: 56 MB)