The LifeCard .22LR / .22WMR by Trailblazer Firearms is a single-shot, folding handgun created to match the size and width Proportions of a normal bank card (3.375″ × 2.125″) having a thickness of around 0.5 inches. https://22-card178461.bloggingcrow.com/61975640/overview-from-the-lifecard-charge-card-gun