STL files are everywhere. When there’s something to 3D print, it’s probably going to be an STL. Which, as long as the model is good just as it is, is no trouble at all. But sooner or la… ...

James Patrick is bound to turn some heads with his PM522 Washbear revolver, the world's first 3D-printed repeating firearm capable of firing up to 8 bullets without stopping to reload.