know about the weaponry and then we will go to what we know about this choice of venue, why this guy may have picked it. it is not new to gun owners. it is a legal accessory. bunk stock. it is the back part of the weapon. let s talk about what this is. because there is a lot of pushback yesterday that this was a modification to have it operate like an automatic weapon instead of a semiautomatic. there was push back, no, this isn t a big deal. this is people attack the gun culture. all of a sudden this has been thrust into our lexicon. sit a workaround. most people in law enforcement, military, are huge proponents of
finger squeeze and a magazine to feed a stream of bullets. the result is one could logically only use in a war. or, like las vegas, a massacre. be advised it is automatic fire. fully automatic fire from an elevated position. reporter: you would think that kind of weapon power would be illegal for average gun owners to possess. think again. this is a slide stock. perfectly legal, aftermarket component. according to the manufacturer s video is, it s easy to assemble on an assault rifle and the ruts, though technically do not make a machine gun, ask yourself if you can tell the difference. that was just one of several ways that you can make a semiautomatic rifle into a fully automatic rifle. reporter: the slide stock is legal to buy and to use. former atf agent sam rabati
the atf says the shooter in las vegas used 12 devices called bump stocks. why? because they modify guns into eventually machine guns. we look at what they do and how easy they are to get. a fully automatic rifle requires two components. a trigger mechanism and a magazine able to feed the weapon with a continuous stream of bullets. the result is the kind of weapon one could logically only use in a war. or like las vegas, in a massacre. be advised it s fully ought fire from an elevated position. you would think that kind of weapon power would be illegal for average gun owners to
mechanism with one finger squeezed and continuous string of bullet. the result is the kind of weapon one could logically only use in a war or like las vegas, in a massacre. be advised it is automatic fire, fully automatic fire from the elevated position. reporter: you would think it would be illegal for average gun owners to possess. think again. this is a slide stock perfectly legal aftermarket component. according to the manufacturer s video, it s easy to assemble on an assault rifle and though the results technically do not make a machine gun, ask yourself if you can tell the difference. that was one of several ways you can make a semi-automatic rifle into essentially a fully automatic rifle. reporter: the slide stock is legal to buy and use. calling it a work-around of the