The figure may not be 60% but I would bet more than 50% own guns based on the sales volumes over the past few years.
www.washingtonexaminer.com
Obama and biden are the two greatest gun salesmen in history!

Boom: Up to 60% of Americans could own guns, twice estimate - Washington Examiner
A surge in “quiet gun owners,” much like the so-called “silent majority” in political circles, is leading firearms analysts to believe that far more Americans own weapons than the accepted 30% cited in polls.At the highest end, it’s possible that up to 60% of Americans own guns, especially with...

Obama and biden are the two greatest gun salesmen in history!