New York can no longer enforce its civilian body-armor sales and possession ban after a federal district court held the measure conflicts with the right to keep and bear arms. The judge treated modern vests as arms in common use, noting large annual sales and legality in 49 states, and found the state lacked any post-ratification analogue. Claims that synthetic materials were unforeseen or unusually dangerous failed because the amendment covers later instruments. A two-week stay lets the state appeal, leaving the restriction in place for now. The Firearms Policy Coalition and private plaintiffs obtained the ruling.