After browsing a site and making your selections, you click the eWallet icon in your Windows task bar, enter your PIN number, and drag your plastic of choice onto the site's order form.
Earlier this week Wilson posted a video online showing a single shot being fired from "The Liberator, " a plastic handgun that, with the exception of a metal firing pin and a piece of metal included to comply with the Undetectable Firearms Act, was assembled entirely from parts made with a 3-D printer.