A three-month window for surrendering weapons newly classified as offensive, including knuckledusters and specified fast firing rifles, opened in Norfolk on Thursday (December 10). - Credit: Picture: Getty Images/iStockphoto/Urilux/Filipovic018 People in Norfolk have been given three months to surrender certain items that will soon be classed as offensive weapons. New legislation, set out in the Offensive Weapons Act 2019, includes measures to control the sale of knives and corrosive substances. It also introduces new offences relating to their possession and use. The scope of a rifle. People in Norfolk are being given three months to surrender fast firing rifles to police under new legislation.