Sounds as if he's been all over the place on this one. They played a clip of him saying that we can't be influenced by "the extremes" on this issue.
He'll find a way to bring the two sides together (paraphrase).
Hillary Clinton Tries to Set Herself Apart From Others on Gun Control
By ALAN RAPPEPORT and MAGGIE HABERMANOCT. 5, 2015
Gun control is a more difficult issue for Mr. Sanders, who has been gaining on Mrs. Clinton in national polls and leading her in some surveys in New Hampshire and Iowa. The independent from Vermont has a mixed record on the issue, having voted against the Brady Bill in the 1990s and opposing legislation that would have allowed lawsuits against gun companies.
In the aftermath of the Oregon shooting, Mr. Sanders urged sensible gun-control legislation which prevents guns from being used by people who should not have them. But he raised some eyebrows when he acknowledged on MSNBC that I dont know that anybody knows what the magic solution is.
On Monday, Mrs. Clinton was less ambiguous. Her voice shook when she introduced the mother of a child who was shot and killed at Sandy Hook Elementary School in Connecticut in 2012, and she was visibly angry when she referred to the National Rifle Association as extremists. While she said she had no problem with the Second Amendment, she said restraints on gun purchases and ownership were needed to reduce crime.
If you actually ask not only Americans but gun owners, the majority of both say, hey, background checks make a lot of sense, Mrs. Clinton said. Lets do everything we can to make sure the irresponsible and ill dont get guns.
http://www.nytimes.com/2015/10/06/us/politics/bernie-sanders-hillary-clinton-gun-control.html?_r=0