Grabin was chief designer of ZiS-3, the 76.2 mm (3.00 in) divisional field gun, which was the most numerous cannon of World War II (over 103,000 cannons were built).
Grabin je bio glavni dizajner produkta ZiS-3, 76,2 mm-skog zemljišnog topa, koji je bio najbrojniji top Drugog svjetskog rata (preko 103 000 primjeraka).