Check out Type 99 10cm Mountain Gun Low-poly 3D model on CGTrader for $40. High-quality mesh by OK3D: 14928 polys, 15063 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 25.5 MB), OBJ (OBJ, filesize: 25.5 MB), FBX (Autodesk FBX, filesize: 25.5 MB), STL (Stereolithography, filesize: 25.5 MB), DAE (Collada, filesize: 25.5 MB), PNG (PNG, filesize: 25.5 MB)