Washington lawmakers have approved funding for a bump stock buyback program.
Following earlier approval in the Senate, lawmakers in the House passed the bill on a 94-4 vote Monday, and attached an amendment making it retroactive.
Bump stocks allow a semiautomatic rifle to fire continuously by letting it slide back-and-forth against a user's shoulder, causing its trigger to 'bump' rapidly against the user's finger. Bump stocks were used in the Las Vegas mass shooting in 2017.
Washington legislators banned bump stocks and created a buyback program at the same time in 2018, but didn't set aside money to pay the $150 promised to each person who turned one in.
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While both the Senate and House have approved the bill, it now goes back to the Senate for approval of the amended version.