LIFECARD .22LR alternative project. Never produced. Metal (steel) and plastic. Not for 3D printing. Disassembling animation is available in .f3d file.
STL (Stereolithography, filesize: 10.7 MB), F3D (Autodesk Fusion 360, filesize: 11.7 MB), FBX (Autodesk FBX, filesize: 13.8 MB)