Gun laws are complicated, and any discussion of them often brings passionate disagreement. Below is a snippet from an article discussing the potential magazine ban in California, which mentions Elliot Rodger.
https://www.thenewamerican.com/…/26376-california-judge-blo…
“There’s also the matter of just how effective the new law might be in reining in gun violence. Much has been said by liberal anti-gunners about mass shootings that involved criminals using firearms with magazines that exceeded 10 rounds: Orlando nightclub, Columbine High School, Sandy Hook, and San Bernardino. Missing from that litany however is any mention of the Santa Barbara shooting (Isla Vista killings) committed by a deranged Elliot Rodger in May of 2014 who used only 10-round magazines in killing seven and wounding 14 before being brought down. Or more recently, the Fresno terrorist Kori Ali Muhammad, who used a revolver (which doesn’t use magazines) to kill four before being stopped and arrested.”
The Gentleman 