“the evidence on the effects of universal background checks and assault weapons bans is pretty weak. Several studies in recent years have found that universal background checks, at least on their own, don’t seem to have a big effect on gun deaths. Similarly, the research on assault weapons bans, including the national ban that Biden helped pass in 1994, found they have little effect on gun violence, largely because the vast majority of such violence is committed with handguns.
But there’s some solid evidence that a license system reduces gun deaths. A 2018 study from researchers at Johns Hopkins University found that universal background checks alone correlated with more gun homicides in urban counties, while license systems were associated with fewer gun homicides. Otherstudies have similarly found that license requirements lead to fewer gun deaths.”
“In Massachusetts, one of the few states with a license system, obtaining a permit requires going through a multi-step process involving interviews with police, background checks, a gun safety training course, and more. Even if a person passes all of that, the local police chief can deny an application anyway. That creates more points at which an applicant can be identified as too dangerous to own a gun; it makes getting and owning a gun harder.”