Dry Fire Block for Umarex Colt Commander BB/Airsoft

This handy little piece allows you to safely dry-fire your Umarex Colt Commander BBgun without fear of damaging the mechanism. Since all Umarex 1911 style models are based on basically the same design, this may work for any or all of them including the Airsoft versions. I have only tested it with the BB version. It is tiny and only takes a few minutes to print so try it out and report back if it works on another model.