Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, once again breaks down the WW2-era British weaponry of Hell Let Loose, including the Lewis Gun, the Boys AT rifle, and the Bren. Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, once again breaks down the WW2-era British weaponry of Hell Let Loose, including the Lewis Gun, the Boys AT rifle, and the Bren.