A prominent House Democrat and lawyer on Friday blasted the Supreme Court for striking down a ban on so-called “bump stocks” — a rapid-fire gun attachment used in the 2017 massacre in Las Vegas — calling it “outrageous,” and pointing out that the federal agency governing such weapons even thinks its an assault weapon. The Supreme Court on Friday struck down the Trump-era ban, with Justice Sonia Sotomayor providing a scathing dissent. “When I see a bird that walks like a duck, swims like a duck, quacks like a duck, I call that bird a duck,” she wrote. “A bump-stock-equipped semiautomatic rifle …