A firearms manufacturer has designed a folding handgun that can deliver a deadly shot - despite being the same size as a CREDIT CARD. The tiny shooter - which can hold five .22 rounds - is the same dimensions as a stack of credit cards and can fit in a wallet. The Lifecard.22LR, known as “the last gun you’ll leave behind”, is small enough to fit in a wallet and weighs just 198g - less than a Big Mac. Manufacturers say the mini gun boasts a steel barrel, bolt and trigger and extra ammo storage for four extra rounds. The company behind the gun, Trailblazer Firearms, is said to have been working on the concept for the LifeCard for seven years.