My DW Specialist (full size) has Ameriglo front and rear sights. The rear looks like a Novak style slide cut. The front is a typical dovetail, not sure dimensions. There is a vertical hole on the front edge of the sight that appears to line up with a hole drilled through the slide. There is no pin in the hole which blocks the hole. You can see light through the hole and there is nothing protruding down through the slide that would hit the barrel bushing if it protruded past flush with the slide. Is this merely an alignment hole for installing the sight in the dovetail? My pistol is new but I have seen some pre-2015 pistols that had a pin in the hole as a shear key. And there was guidance to not let the pin go through that might contact the barrel or bushing. Is there supposed to be a pin there? I suppose it’s possible there is a hollow roll pin in the hole as it appears the light you can see is slightly smaller than the hole drilled in the slide. But if there is a roll pin it does not make it to the inside edge.