Brendan Fitterer

In this Feb. 11. 2017 photo, Bill Akins, right, speaks during a Pasco Planning Commission hearing in New Port Richey, Fla. Akins was the first to file a patent for an attachment to a semiautomatic rifle that would enable it to fire bullets at a rate approximating that of an automatic weapon. Authorities said the Las Vegas shooter had a dozen similar devices, known as "bump stocks,” in his hotel room.