Story. Also tonight, could be finally see a consensus on gun control . Tonight both sides of this divisive issue seem to agree on one thing. This device used by a las vegas gunman needs more scrutiny. Theyre called bump stocks and allow a weapon to fire rapidly like an automatic weapon. Were shown how these items have been flying off the shelves. Its resetting so quickly that it seems like automatic, but its not. Reporter luke kelly describes to us how this semiautomatic gun could be adjusted to fire at a faster speed. Its almost like a one piece type of thing. That you take off. Theres a bolt that holds the grip in here. Reporter its the kind of gun that can be legally altered using bump stocks. Were told some websites are crashing from high demand after the las vegas massacre. Others saying theyre stopping new orders from now. Kellys store already taking new calls from interested customers, telling nbc news nothing is available. Youre a responsible gun owner, you do it in a controlle