I will relate my own use (not repair) experiences with the 1911 while in the Army. Cocked and Locked was expressly forbidden by directive when I was in. ('86-'89) So was carrying with hammer down, round in chamber. The only modes of carry allowed (officially) were mag in, hammer down on empty chamber, or mag out, hammer down on empty chamber. At least when guarding with a 1911, you could have a loaded magazine, and in the pistol even. If you were guarding with a rifle, you were issued a sealed box of M198, and one 20 round magazine. (Until we had to turn the 20 rounders in, then one 30 rounder.) You were not authorized to open the box unless you had challenged an intruder and they failed the password for the day. I guess command figured they'd wait around while you loaded your magazine.....
I only drew my M16A1 for guard duty once. I grabbed a 1911 everytime after that. (I was the Unit Armorer, so I could grab what I wanted.)