The LifeCard .22LR / .22WMR by Trailblazer Firearms is just one-shot, folding handgun made to match the length and width Proportions of an ordinary charge card (three.375″ × 2.125″) using a thickness of around 0.5 https://lifecard-suppressor045872.toto-blog.com/780160/overview-on-the-lifecard-charge-card-gun