A recent study published in the Proceedings of the National Academy of Sciences reveals that across all political and social groups in the United States, there is a strong preference against living near AR-15 rifle owners and neighbors who store guns outside of locked safes. This surprising consensus suggests that when it comes to immediate living environments, Americans’ views on gun control may be less divided than the polarized national debate suggests.
The research was conducted against a backdrop of increasing gun violence and polarization on gun policy in the United States. The United States has over 350 million civilian firearms and gun-related incidents, including accidents and mass shootings, have become a leading cause of death in the country. Despite political divides, the new study aimed to explore whether there’s common ground among Americans in their immediate living environments, focusing on neighborhood preferences related to gun ownership and storage.
Others have already explained how they’re both equally lethal, but to your point about mass murderers using the one over the other: The top rifle can be had for ~$400 & looks like the one all the soldiers and video game guys use. The bottom is closer to $1000 and does not look as cool (to the young adult male demographic that commits most mass shootings, at least). I would argue those two factors account more for their difference in mass shooting use than anything else.