Peter had a great idea....

...why not put one of the Eisenkern Heavy Weapons in the cargo bed of the 'Bear'? As they say "Great minds think alike..." and had already tried with, for me, mixed results. The mount of the AA gun will fit the cargo bed if you place one leg in the space between the driver and front passenger. The leg would need raising as the driver/passenger area is lower than the cargo bed. The main problem I have with this configuration is the lack of traverse as the gunner's movement is restricted by the wheel arches and front seats. You could of course have the AA gun controlled electronically from the front passenger seat....