The man who confessed to killing 68 people in Norway last week says he bought the ammunition clips used in his shooting spree from the U.S by mail order.

Anders Behring Breivik wrote in his 1,500-page manifesto that he spent $500 for 10 30-round clips.

Clips with more than three rounds are banned from sale in Norway.

Rep. Carolyn McCarthy (D-NY), who introduced legislation to limit high-capacity ammunition clips following the shooting of Rep. Gabrielle Giffords (D-AZ), told Politico that U.S. lawmakers should be ashamed.

"We're sending a death warrant to other parts of the world," she said. "Unfortunately now, internationally, it's known that you can get here, buy your guns, buy your large magazines, and you're not going to have any problem"

Watch this video from MSNBC's News Live, broadcast July 29, 2011.

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