The rate of murder by all rifles, including "assault" rifles, is spectacularly low, under 400 total for 2011. 13 states had NO murders by rifle: Colorado, Connecticut (ironically), Delaware, the D of C, Hawaii, Idaho, Massachusetts, New Hampshire, North Dakota, South Dakota, Utah, and West Virginia. Four States; Nebraska, Oklahoma, Rhode Island, Vermont, and the U.S. Virgin Islands each had one rifle involved death in 2011.
Seventeen states had five to one rifle-involved murders in 2011.
Note that deaths by so called "assault" rifles are so few that thd FBI maintains no separate stats on them.
Someone savvy on links please post a link to this for me.