Well, sort of
"Adam Lanza killed 26 students and teachers at Sandy Hook School with an AR-15 semi-automatic rifle."
Of course the most common unifying factor in violent crime in this country is alcohol. So unless one wants to be held up as a total hypocrite, the first thing anyone should campaign to ban would be all legal alcohol sources.
Failing to do so would show one not to be concerned about human life but pursuing a cynical personal agenda