FBI reports "Hands, fists, feet, etc." commit 5.7% of murders, Rifles and Shotguns for 5.4%.

http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/tables/table-20

I'm sure you want mandatory liability insurance and taxation on "Hands, fists, feet, etc."

ON EDIT ADD
"Knives or cutting instruments" at 13.3% should also be included with your policy.