yea all im seeing is varations in grips, finish, sights, and what the slides or frames are made out of, all seem to measure 1.1" width, I don't even find any with acc, rails just the one model with the laser sights. yup found some more info two slide widths 11/16 or 13/16 seems they first used the thicker slides on the hd but now use it on other variations as well, seems to be a lot of trouble for the kydex holster crew also. I see some holster makers are asking basically which slide thick or thin, don't know how you could walk them through it any other way without measuring tools.