Originally Posted by mithuth
That guy's a hack. There was a big thread about him on PAFOA (Pennsylvania Firearm Owner's Association), he's from like AR or KY area of the USA if I'm remembering correctly.
That automatic bumpfire stock is 350-400
look under "bumpfire" on youtube, it can be done without a special stock.
Yeah I think you can actually do it with something as simple as a good rubber band. Not as cool looking though!