Only by definition. You can say that a single man killing 58 and wounding 500 more isn't a battle in a strict sense, and you can say that his semi-auto rifle with huge magazine firing at a fully automatic rate wasn't an automatic weapon, strictly speaking; but if it quacks like a duck... But, what exactly is the point? In real combat, how many times does a single man with a weapon cause that many casualties? And true, the rifle didn't kill anyone - wait- oh right, it was the hundreds of bullets that killed all those people. The point is, the "guns don't kill people, people kill people" trope is one of the stupidest utterances ever made, and only nitwits repeat it. And hammers kill more than 35 thousand Americans a year through premeditated homicide? Let's get real.