Colt Python 357 with Bullets 3D model is available on CGTrader for $2. Original author: CromoPrime. Specs: 26910 polys.
OBJ (OBJ, filesize: 763 MB), MA (Autodesk Maya, filesize: 375 MB), JPG (JPG, filesize: 375 MB), FBX (Autodesk FBX, filesize: 377 MB)