Dave, I said it before, there is no easy solution solution in the U.S due to the incredible number of firearms in private hands. I found these nuggets in a report to the US Congress. Here is how many Guns are estimated to be in the US, I was surprised at the acceleration:
How Many Guns Are in the United States?
The National Institute of Justice (NIJ) reported in a national survey that in 1994, 44 million people, approximately 35% of households, owned 192 million firearms, 65 million of which were handguns.
Seventy-four percent of those individuals were reported to own more than one firearm.
According to the ATF, by the end of 1996 approximately 242 million firearms were available for sale to or were possessed by civilians in the United States.
That total includes roughly 72 million handguns (mostly pistols, revolvers, and derringers), 76 million rifles, and 64million shotguns.
By 2000, the number of firearms had increased to approximately 259 million:
92 million handguns, 92 million rifles, and 75 million shotguns.
By 2007, the number of firearms had increased to approximately 294 million: 106 million handguns, 105 million rifles, and 83 million shotguns
Per capita, the civilian gun stock has roughly doubled since 1968, from one gun per every two persons to one gun per person.
There is a bright spot:
How Often Are Guns Used in Homicides?
As Ta b l e 1 shows, reports submitted by state and local law enforcement agencies to the FBI and
published annually in the Uniform Crime Reports indicate that the firearms-related murder and
non-negligent manslaughter rate per 100,000 of the population decreased from 6.6 for 1993 to 3.6
for 2000.
The rate held steady at 3.6 for 2001 and fluctuated thereafter between a high of 3.9 for
2006 and 2007, and a low of 3.2 for 2010. For 2011, it has remained at 3.2.
It is a long report to Congress with some interesting facts in it, it is just facts with no opinion. You can find it here:
http://www.fas.org/sgp/crs/misc/RL32842.pdf 
