In my very limited military experience with the M9, circa 1991, the mandated carry mode was "round chambered, safety on". I believe that the military specifications for the M9 trials included double action operation to address the speed/safety dilemma of carrying the M1911A1 either in Condition Three (chamber empty, hammer down) or Condition One (chamber loaded, hammer cocked, safety on).
I have heard of some skittish commanders ordering the M9 to be carried with an empty chamber, but that is just a CYA move and not the method found in the military manuals.
IMHO, the 92FS is such an easy pistol to shoot, even in double action, that there's no need to carry it half-cocked. If you want to carry a pistol half-cocked, buy a Glock.
I have heard of some skittish commanders ordering the M9 to be carried with an empty chamber, but that is just a CYA move and not the method found in the military manuals.
IMHO, the 92FS is such an easy pistol to shoot, even in double action, that there's no need to carry it half-cocked. If you want to carry a pistol half-cocked, buy a Glock.