slide fire... why dont y'all just go light a string of black cats, you'll get the same outcome.
I believe he mentions in the video i posted above that it is the new version of the slidefire that bolts right on to the M&P 15-22 with no mods but I don't have any experience with it myself. Looks like a fun way to run through some 22lr!
slide fire... why dont y'all just go light a string of black cats, you'll get the same outcome.