Yes because making it borderline impossible for ANYONE to get access to guns has worked out so well.
In American, in 2004, an estimated 16% of state prison inmates and 18% of federal inmates reported that they used, carried, or possessed a firearm when they committed the crime for which they were serving a prison sentence. In 2004, among state prison inmates who possessed a gun at the time of offense, fewer than 2% bought their firearm at a flea market or gun show, about 10% purchased it from a retail store or pawnshop, 37% obtained it from family or friends, and another 40% obtained it from an illegal source. This was similar to the percentage distribution in 1997. So the lions share of people getting their hands on guns comes from an illegal source or they just get it from a friend or family member.
http://www.bjs.gov/content/pub/pdf/fv9311.pdf