Pro-gun rally in front of Maryland State House in Annapolis on Feb. 6, 2013 protesting the state’s controversial Firearms Safety Act. (Photo: Andrew Harnik/The Washington Times) A long-simmering challenge against Maryland’s 2013 Firearms Safety Act has been appealed to the nation’s highest court. Attorneys for the Maryland State Rifle and Pistol Association and the National Shooting Sports Foundation on Friday filed the 325-page petition to the U.S. Supreme Court on behalf of Stephen Kolbe and a series of gun stores and shooting clubs asking the court to protect popular semi-automatic rifles and magazines from prohibition. At stake is the 2013...