You don't need to - anyone who takes apart the gun will see how that works. You actually just remove one part and it's full-auto. However, books to make seers a

You don't need to - anyone who takes apart the gun will see how that works. You actually just remove one part and it's full-auto. However, books to make seers and whole weapons have been available through Paladin Publications at gun shows since the '90s and are now fully scanned and torrentable.