MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Some slicer have ability to split combined stl ( cura: right click split object, simplify 3d, etc)
But doing that would enable you to print the three Armor plate separately... But the pivot would not be usable since it been designed to be printed and locked in place... But if you split it in half, with little work you could probably glue it together in place....