There was only one entrance and this was covered by sliding doors, made of 50cm thick steel armoured plate and concrete.

The prototype had an armoured plate protecting this assembly but it was omitted on the production vehicles to save weight, leaving only two elongated beams to brace the whole.

Body scales are relatively large, with wide, close-knit armoured plates on the back.

Where this was not possible, armoured plates could be factory made.

Like many of its relatives, it had heavy armoured plates along its back, tail, and parts of the underside.