Wow! IT’S A FIT: Our regular Glock sights DO FIT the Glock 42, as you can see. The slide of the 42 is wider than our Glock rear sight, and the radiused portion of the dovetail is obscured by ATS rear sight. So, it doesn’t seem to have the aesthetic issues I though it would have. We are going to mention on the Glock product page, that our Glock sight is also good for the 42.
By the way, I found my Glock 42 to have a rather crisp trigger and a short reset. What a pleasant surprise. Now, if Glock will just someday make it in a 9mm.