Bentley Motors is claiming its new 'B6-specification' Bentley Mulliner 'protected limousine' is immune to such events as an attack from a Kalashnikov AK-47 assault rifle, probably the most recognised terrorist weapon in existence. Bentley is in fact claiming the new car offers ballistic protection from even more significant firepower and will protect occupants should high-powered hand grenades detonate above the roof even while two detonate simultaneously below the floor.