The shooter had 10+ minutes of unopposed shooting of innocents before armed police entered the building. He saw them and quickly killed himself as he wanted to die, not be captured.
The type of firearm, magazine capacity and bullets used were not the problem, the problem was a gun free zone and no good person on site capable of stopping him. He could have killed just as many in those 10+ minutes with two old Colt style revolvers and a pocket full of bullets. He was the monster, not the weapons.
I agree. But instead of figuring out what was wrong about him, they will focus on the hardware he used.