Via Steven Aftergood of Secrecy News, it appears that the Congressional Research Service completed and published a report on Gun Control on 3 August of this year. The author is one William J. Krouse, who also authored a piece on hate crimes legislation in 2010.
The only serious problem is the very usual fact that CRS was not authorized to release this report to the public. The report itself is a good thing. Congressmen frequently make badly informed statements about firearms, and some framing of the debate with quality information is beneficial. CRS expects a debate in the next Congress on the subject, so it's trying to anticipate the need for facts. CRS is a good service, and tries to be nonpartisan. The report attempts to outline the basic arguments for and against gun control, and provides what it takes to be the best available statistics (which show, as you will see, a nearly continuous decline in gun violence, gun related deaths, and so forth in spite of an explosion of gun sales over the last twenty years).
There is a lot here that's worth reading if you intend to be involved in the debate that CRS expects the next Congress to have.