I purchased the .420 x .100" and paired it with a Volquartsen adjustable rear sight on a Mark IV 22/45 that I shoot steel matches with. Combination works great. I have Dawson sights on other pistols and they are always bright and crisp. This one is no different. I like the option of a little narrower front sight from the stock form to give a little more light around the front sight as viewed during sight alignment. It's nice for speed and shooting multiple targets but I can still easily hit an 8" steel plate at 50 yards. I'm going to buy another set soon for a different project.