There have been some discussions about this previously, with some slight tangents on the focus of the memo, but now the NRA and others have verified that the DOJ memo is legit and the 'plan' has always been for gun confiscation. "They" admit that there's no other way for 'gun control' to "work":

http://bearingarms.com/yes-an-obama-...-registration/

http://www.examiner.com/article/doj-...n-confiscation

Snippet:
The DOJ memo (downloadable here as a PDF) states the administration “believes that a gun ban will not work without mandatory gun confiscation,” according to the NRA, and thinks universal background checks “won’t work without requiring national gun registration.” Obama has yet to publicly support national registration or firearms confiscation, although the memo reveals his administration is moving in that direction.