A Slide Fire bump stock in action. (Photo: Slide Fire/Facebook) The association representing current and former ATF employees has pushed back against critics blaming the agency for approving bump stocks. The ATF Association said the agency “does not have the legal authority to regulate” bump stocks, which allow semi-auto rifles to mimic full-auto fire. “The bump slide, and several other similar after-market accessories that increase the rate at which a shooter can pull the trigger, are engineered to avoid regulation under Federal law,” said Michael Bouchard, ATFA president, in an open letter last week. “The notion that ATF chose not...