The Second Amendment Foundation filed an amicus brief in Maryland's Supreme Court supporting Darius Duvall's petition challenging the state's refusal to recognize out-of-state carry permits. The brief, joined by Maryland Shall Issue, National Rifle Association, California Rifle & Pistol Association, Minnesota Gun Owners Caucus, Second Amendment Law Center, Citizens Committee for the Right to Keep and Bear Arms, and Cato Institute, argues Maryland's policy violates the Second Amendment and lacks historical precedent.
