Note from the recent, exhaustive Gallup poll that I and others posted here that you can't even remotely trust gun self-reporting right now. In the Gallup poll most of the responses were decidedly "pro" gun. More people said they were buying, or interested in buying, or were pro-second-amendment, in the past few (Obama administration) years.
HOWEVER... to the questions of 'do you have a gun in the house', etc., all of a sudden the upward trend turned down. Basically.... people are less likely to answer a pollster on that question right now because they don't want the data out there. Probably for reasons ranging from worries that the firearm might be made illegal, so basic privacy ones. (Witness the websites and media outlets that have published gun owners / CHP permit holders addresses.)