Check out 24-pounder naval cannon Low-poly 3D model on CGTrader for $2. High-quality Polygon mesh mesh by onmac17: 5790 polys, 3323 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 1.55 MB), FBX (Autodesk FBX, filesize: 228 KB), GLTF (glTF, filesize: 65.7 MB), STL (Stereolithography, filesize: 9.04 MB)