1911's can be dry-fired from here to Kingdom Come. I have a Colt 1991A1 that I've dry-fired thousands and thousands of times through trying to learn how to perform trigger jobs, and it's none the worse for wear. There are very few center-fire pistols that I am wary about dry-firing....one is the Browning HiPower because the hammer spring is so strong, and the other is the Beretta 92 because the firing pin is 2-piece.....and the other is the CZ-52 because the firing pins are crap.