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American Ingenuity at its best.

MINNEAPOLIS -- A new twist on the idea of concealable weapons, the credit card-sized shotgun, is shown at Koscielski's Guns and Ammo, the only gun shop in Minneapolis. It's a two-shot weapon machined from a block of metal the height and width of a standard credit card, and about a half-inch thick. Each barrel fires seven standard steel BBs. It will retail for $100. Mark Koscielski, owner of Koscielski's Guns and Ammo, and Patrick Teel, who makes the guns in suburban Blaine, gave The Associated Press a preview Tuesday night ahead of a news conference scheduled for Wednesday. They said the guns are meant to be used only for close-range self-defense and wouldn't be effective as offensive weapons.