If you are carrying a 1911 for personal protection you might think about upgrading it to a set of sights you can see at anytime; Green Lantern sights that are visible in the brightest of day and the darkest of night. I have three 1911s and all are fitted with XS Sights 24/7 Big Dots because I never want to not be able to see my sights.
Fitting sights to a 1911 can be confusing because they are made by so many manufacturers and so many different cuts are used in the slide. HERE on the XS Sights web site you can identify which cut you have to simplify ordering. (Select “Colt”, “Kimber”, “Springfield” or whatever 1911 you have and then continue per prompt.) Alternatively, or if you don’t see your handgun listed, you can call XS for assistance and even send them your slide they will install.