Gun drill and nomenclature. Know your weapon, know it intimately, know it with almost the insight of its inventor; be able to take it apart blindfolded or in the dark, to put it together; be able to recite mechanically a detailed description of the gun’s operation; know the part played by every member of the squad, from gunner down to the unfortunates who carried the water can or the machine gun boxes, as well as their own rifles.
