Eye opening graphic.
According to USA Today, cited by AAS here:
https://www.statesman.com/story/news/2022/05/26/what-gun-used-texas-school-shooting-ar-15/9940849002/
AR15s have only been used in 12 mass shootings since 2012? That doesn't seem right?
That line is also right when Facebook was created, then twitter, iphones in '07... The big purple dot at '07 is VTech. It was the most covered news event of the year:
https://www.pewresearch.org/journalism/2007/04/23/pej-news-coverage-index-april-15-20-2007/
VTech was perpetrated using 22LR and 9mm pistols. 22LR is a tiny round with barely more kick than a pellet gun (see image for reference).
These events consume people's attention in a way they simply couldn't prior to the approximately the red line.
If the motive is infamy in the digital age, and ARs have only been used in 12 of those dots, an AWB would have limited if any impact.
Raising the age of ownership of semi autos for young males, waiting periods for young males, criminalize failure to secure firearms, and red flag laws are where I'd put my attention. Negligent storage laws and red flag laws exist in a limited number of states.