Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down the weaponry of DOOM and DOOM Eternal, including the Super Shotgun, the Plasma Rifle, and, of course, the BFG. Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down the weaponry of DOOM and DOOM Eternal, including the Super Shotgun, the Plasma Rifle, and, of course, the BFG.