Las Vegas Shooting: N.R.A. Supports New Rules on ‘Bump Stock’ Devicesbr Twelve of the rifles the Las Vegas gunman, Stephen Paddock, had in a high-rise hotel suite when he opened fire on a crowd on Sunday were outfitted with “bump stocks,” devicesbr that allow a semiautomatic rifle to fire hundreds of rounds per minute, which may explain how he was able to shoot so quickly, killing 58 people and wounding hundreds of others.br LAS VEGAS — The National Rifle Association on Thursday endorsed tighter restrictions on devicesbr that allow a rifle to fire bullets as fast as a machine gun — a rare, if small, step for a group that for years has vehemently opposed any new gun controls.br to re-evaluate bump stocks, which he said have “no place in civilized society.”br Twelve of the rifles the gunman had in his hotel room were outfitted with a “bumpbr stock,” an attachment that enables a semiautomatic rifle to fire faster.