so now we'll go ahead and do the bump fire. >> right. so you see that there. they're relatively cheap, about 150 to $3. easy to find, easy to install. but the most frustrating thing about these, the glaring loophole here is because every time your finger comes off that trigger and then pulls it again, they are technically legal. that is still technically a semiautomatic rifle. as we mentioned, wildly inaccurate, but if you have an extended magazine, if you have a scope, if you have a tripod, if you're sitting in an elevated position looking down on thousands of people, what the result was, obviously, this week was the worst mass tragedy -- mass shooting in american history, brian. >> steve patterson in the background there, of course, is the manned lay bay, hotel and casino in las vegas. steve, thank you so much. and joining our conversation at this point is erica warner,