1860 12 Pounder Civil War Cannon Low-poly 3D model is available on CGTrader for $2.99. Original author: markrobbins47. Specs: 17077 polys, 26077 verts.
STL (Stereolithography, filesize: 89.5 MB), FBX (Autodesk FBX, filesize: 135 MB), GLTF (glTF, filesize: 133 MB), MAT (mat, filesize: 89.3 MB), TEXTURES (Textures, filesize: 46.1 MB), PNG (PNG, filesize: 46.1 MB)