Yup it will have to be shallow. I'm familiar with the guttersnipe but want a smoother lower profile finished product. Even with a shallow gutter I think with some practice a person could become proficient (at least within the limitations of the design). I realize its not the type of sight you'd want on a bullseye pistol, its more of a case of wanting to try something different. Another option would be to checker or serrate a line on the top of the slide. This would eliminate the removal of material above the lugs. It would more or less be a reference line for sighting along. Again, practice and familiarity with how this specific pistol shoots would help. An easy way to find out would be to use a marker to simulate the gutter/whatever and take it to the range and test it out. Find out where the pistol is shooting and find out how consistent I can be. If I can't maintain any kind of consistency then I save myself the time before "ruining" the slide.