Wikipedia:
“Two-thirds of all gun-related deaths in the United States are suicides. In 2010, there were 19,392 firearm-related suicide deaths, and 11,078 firearm-related homicide deaths in the United States.”
http://en.wikipedia.org/wiki/Gun_violence_in_the_United_States
Gun stats in America are usually pretty slanted.
For instance Detroit has a very high murder rate but it also has the highest justifiable homicide rate (about 5 per week) which is statistically counted as murder.