No resistance with my Bianchi suede IWB holster. The new sight is the same height as the original ; not tall enough to catch or bind. Top is rounded. The only way it could catch is if the muzzle and sight protruded from the open bottom of a holster , but I never carry that way.
The good part is : the original front sight looked to me like a little black brick. With my vision I had lots of difficulty with sight acquisition. The new bead sight jumps out at me , even in poor light. We actually turned the little bead on a lathe to achieve the correct width and height. You can see the turn marks. I decided against polishing the turn marks smooth because I believe that the tiny facets reflect light better than a would smooth surface.
The original sight was unacceptable to me. I did not like the appearance of a HiViz on a good looking revolver with Hogue CoCobolo grips. I decided I wanted a brass bead , partly because it would be visible , and also because it would be unconventional. It wasn't easy , but now I have my one-off custom brass bead front sight.
A quick trip to the range late yesterday confirmed that my idea was a good one.