FILE - In this Oct. 3, 2013, file photo, a custom-made semi-automatic hunting rifle with a high-capacity detachable magazine is displayed at a gun store in Rocklin, Calif. Such magazines enable a shooter to fire to fire 30, 50 or even 100 bullets before having to reload. They have been used in previous mass shooting and are under scrutiny again after the Sunday, Oct. 1, 2017, massacre in Las Vegas. (AP Photo/Rich Pedroncelli, File)
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