 Armour composition has not been disclosed but is understood to include a steel base layer with a mix of internal/external aluminium, composite/ceramic and Kevlar components.The advantages of a bolted/bonded construction are stated to be ease of repair following damage, the option to upgrade parts or all of the protection as new technologies emerge, plus the ability to swap out specific panels to reconfigure a vehicle.An example here might be replacing a solid roof panel for one with a hatch and/or the ability to mount a weapon station.