an ammunition supply system including a vehicle having a fluted drum which receives an ammunition belt including a plurality of interconnected tubular members each of which carries a round of ammunition of a size in the range of 20 mm to 40 mm . within the vehicle , the shells are removed from the tubular members while the belt is on the drum and such shells are transferred to a feed belt which carries the rounds of ammunition to an armament system . simultaneously , empty shell casings and misfired rounds are returned from the armament system and are inserted into the tubular members of the ammunition belt while such tubular members remain on the drum . thereafter , the ammunition belt is discharged from the vehicle into a receptacle .