Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down more of the weaponry of Rainbow Six: Siege, including the AK-74M, the P90 and .44 Mag Semi-Auto. Jonathan Ferguson, a weapons expert and Keeper of Firearms & Artillery at the Royal Armouries, breaks down more of the weaponry of Rainbow Six: Siege, including the AK-74M, the P90 and .44 Mag Semi-Auto.