 Fittings in the vehicle provided for carriage of 900 rounds of ammunition for the machine gun, which was either an MG 34 or older MG 18 in some examples, though in the field it was common for the gun and ammunition storage to be removed to allow for additional internal space.While room existed within this structure for map boards, paperwork and other kit required for operational command and radio operation, the vehicle's interior remained small, a factor leading to its rapid replacement by conversions of larger tanks.Six such conversions were made but meanwhile a new chassis was developed with offered more space for the modifications, and all production vehicles were made on this larger base.