Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down more of the weaponry of Spectre Divide, including the M18 Drummer shotgun, the M10 Brat, and the Berserker RB3. Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down more of the weaponry of Spectre Divide, including the M18 Drummer shotgun, the M10 Brat, and the Berserker RB3.