Massachusetts’ ban on assault weapons and large-capacity magazines doesn’t violate the Second Amendment of the Constitution, a U.S. judge ruled, handing a victory to gun-control advocates seeking to pass such a law nationwide as deadly mass shootings become commonplace.
"The AR-15 and its analogs, along with large capacity magazines, are simply not weapons within the original meaning of the individual constitutional right to ‘bear arms,’" U.S. District Judge William Young wrote in a decision Thursday in Boston, dismissing a lawsuit over the state law.
https://www.bloomberg.com/news/articles/2018-04-06/massachusetts-s-ban-on-assault-weapons-upheld-by-federal-judge