Had he already released his plans? If so, get copies on TOR sites.
Looks like the torrent's already at http://isohunt.com/torrent_details/458559021/def+cad+3d+gun?tab=summary . Word's out. Can't get the toothpaste back into the tube...
I’m sure there are copies out there that will eventually get wide release. There will likely also be a flood of other plans released by other developers. This genie isn’t going back in the bottle.
There are tens of thousands of copies all over the world.