Hi everyone, Relatively new to Glocks, as I've only had my G19 for just over a year now. I bought my Gen 4 G19 back in May of 2011, and have put somewhere between 1,000 and 1,500 rounds through it over the past year or so. About 700 or so have been my own reloads, and none have been loaded to the max load; the most recent load I've been using is 3.6 grains of Unique pushing 147 grain lead bullets. Always functions great, and they feel a bit softer than the factory Speer +P rounds I have for self defense. Tonight I shot 60 of these rounds without incident; everything felt just the way it should. When I took it apart I found this: I figure that I either: (A) Completely forgot that a hole is supposed to be there allowing me to view the striker or (B) Somehow, some way blew a small hole in my slide. Am I going crazy, or is this hole really not supposed to be there? If not, how the heck does this happen? Sorry for the dirty condition guys, I took these without cleaning it.