https://www.washingtonpost.com/local/public-safety/appeals-court-decision-casts-doubt-on-marylands-assault-weapons-ban/2016/02/04/8a234240-cb59-11e5-88ff-e2d1b4289c2f_story.html

"A federal appeals court on Thursday cast doubt on the legality of Maryland’s 2013 ban on assault weapons and high-capacity magazines passed after the mass shootings at an elementary school in Newtown, Conn.The 2-1 decision by a panel of the U.S. Court of Appeals for the 4th Circuit sends the gun-control law back to a lower court for review because it “implicates the core protection of the Second Amendment.”
In its majority opinion, written by Chief Judge William B. Traxler Jr., the court found that the Maryland law “significantly burdens the exercise of the right to arm oneself at home.”"

"In a strongly worded dissent, Judge Robert B. King wrote: “Let’s be real: The assault weapons banned by Maryland’s [law] are exceptionally lethal weapons of war” and as such, he said, not constitutionally protected."

How can a jurist reviewing a decision on firearms not be familiar with the SCOTUS decision US v Miller: In United States v. Miller (1939), the Supreme Court ruled that the federal government and the states could limit any weapon types not having a “reasonable relationship to the preservation or efficiency of a well-regulated militia”?