In the world of compact firearms, few types have caught just as much notice as the folding credit card gun. Officially often known as the LifeCard 22LR, this exceptional pistol from Trailblazer Firearms folds down to the size of a stack of credit cards, which makes it The most discreet handguns available.What's the LifeCard 22LR?The LifeCard 22LR (