4 coatings of PLA Army PLZ70 122mm self-propelled howitzer Low-poly 3D model is available on CGTrader for $29. Original author: ShuyangXi. Specs: 18464 polys, 19861 verts.
OBJ (OBJ, filesize: 465 KB), FBX (Autodesk FBX, filesize: 1 MB), SPP (Substance Painter, filesize: 290 MB), 3DS (3D Studio, filesize: 412 KB), MAX (Autodesk 3ds Max, filesize: 205 MB)