cannon 09 3D model is available on CGTrader for $4. Original author: khaleel-89. Specs: 208458 polys, 179256 verts.
STL (Stereolithography, filesize: 9.94 MB), 3DS (3D Studio, filesize: 11.1 MB), F3D (Autodesk Fusion 360, filesize: 3.56 MB), SKP (Sketchup, filesize: 7.62 MB), MAX (Autodesk 3ds Max, filesize: 26.6 MB), FBX (Autodesk FBX, filesize: 36.9 MB)