a fully automated , integrated , end - to - end synchronized and compact manufacturing system produces polymer or metal case ammunition . manufacturing stations support case assembly , sealing , final product inspection , cartridge packaging or binning , and loading . station modularity facilitates rapid changeover to accommodate ammunition of differing calibers . sensors and apparatus may be provided to place a manufacturing cell in a wait state until all components or materials are received in a preferred orientation for proper assembly . the system may join and use multipart cases , each including a lower portion with a head end attached thereto and at least one upper portion having a necked - down transition to the open top end . elevator feeders , vibratory bowl feeders , and robotic pick - and - place feeders may be used to deliver components for assembly .