Per the Wikipedia:
Benitez opens his opinion with the statement that the AR-15, like “the Swiss Army Knife", is "a perfect combination of home defense weapon and homeland defense equipment. Good for both home and battle". In the 2008 District of Columbia v. Heller Supreme Court decision that ruled handguns could be kept in the home, associate justice Antonin Scalia cited "the historical tradition of prohibiting the carrying of 'dangerous and unusual weapons'," such as "weapons that are most useful in military service — M–16 rifles and the like."[
I expect this decision to have tragic consequences.