How many American guns are in fact headed south to the Mexican cartels? If prominent Democrats are to be believed, nearly all of them. Thus, according to Secretary of Homeland Security Janet Napolitano, “70% of the weapons in the hands of the drug cartels are coming from the U.S.” Democratic Senator Dianne Feinstein of California, who contends that restricting gun availability in the U.S. would help prevent violence in Mexico, cites an even higher figure of 90%. (Notably, Feinstein got a concealed carry permit for herself and once vowed to defend herself from a terror group called the New World Liberation Front by stating that if its members tried to harm her, she “was going to take them with me.”) Not to be outdone, Nita Lowey, the far-Left congresswoman from New York, states that fully 97% of all weapons find their way to Mexico via the U.S. Those are indeed staggering numbers. But there is reason to doubt their accuracy.
William Hoover, assistant director of field operations at the Bureau of Alcohol, Tobacco, Firearms and Explosives, argues that no such volume of American-made weapons are headed south. Says Hoover, “The investigations we have, that we see, for firearms flowing across the border don’t show us individuals taking thousands of guns a day or at a time flowing into Mexico.” His claim is buttressed by the fact that Mexican authorities have refused to provide U.S. law-enforcement officials with the serial numbers of weapons confiscated from drug cartel members—a likely indicator that the weapons were obtained not from American gun shops but rather from illegitimate sources elsewhere.
http://www.opposingviews.com/i/hillary-clinton-s-assault-on-the-second-amendment
It's actually closer to - of all the traceable weapons Mexican authorities have recovered, 17% of all the traceable weapons can be traced back to the US. The rest are coming from other places. They probably come from China. Norinco Type 56. Which is the same weapon used by child soldiers in Africa. Last time I checked, these guns don't come from the United States because it's been illegal to import them since 1994.

