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The 5.56mm M855 “green-tip,” pictured left, is one of the ammunition types targeted by the ATF to be reclassified as an armor-piercing round. (RYAN ABELLA/Miner)

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Proposed ban on some AR-15 ammunition prompts buying spree

KINGMAN - The Obama administration is considering banning a type of ammunition used in one of the most popular types of rifles because it says the bullets can pierce a police officer's protective vest when fired from a handgun.