CNN: “A federal ban on bump stocks — attachments that essentially allow shooters to fire semiautomatic rifles continuously with one pull of the trigger — begins Tuesday. The US Justice Department issued the rule in December, deciding that existing prohibitions against fully automatic weapons also covered bump stocks. Owners were given 90 days to turn in or destroy them, and that period ends Tuesday. Bump stocks came under scrutiny after the October 2017 massacre in Las Vegas. Stephen Paddock opened fire from his hotel suite onto outdoor concertgoers with rifles fitted with bump stocks, killing 58 people and wounding hundreds of others. Various groups have challenged the ban in court, but for now, it is in effect. Here’s what to know about bump stocks, the ban and what owners need to do…“