Minnesota Star Tribune

'Bump stocks' mimic machine guns

Replacement stocks called 'bump stock' allow an AR- or AK-style rifle to fire at a rate of up to 800 rounds a minute. The gunman at the Las Vegas massacre is reported to have used the 'bump stock.'

By Raymond Grumney

October 3, 2017 at 6:53PM

(Raymond Grumney/The Minnesota Star Tribune)

about the writer

Raymond Grumney

News Graphics Director

Ray Grumney is the news graphics director at the Star Tribune, with a proven 30-year award-winning track record. He is a driven visual journalist focused on developing and implementing high-impact design solutions to sometimes complicated data-driven stories.

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