Careful, I tried to make the same point last week here and someone here argued vociferously that the AR was still more deadly because it could kill you twice as dead.
Remember that compared to rifles, handguns are little more than pathetic pop guns.
I hear you, I tried to make the argument with a liberal just to frustrate them and said, go ahead ban the AR-15 and watch real carnage the next a mass shooting happens when the guy uses a 12 gauge shotgun with buckshot at close range....or someone with a bag full of glock magazines and spends a minimal amount of time practicing reloads...