Hey everyone, I'm new here. I was recently gifted a Gen 2 Glock 21 and I wanted to change out the sights to some night sights, I ordered the TFX Pro's and when I installed the front I noticed that it's slanted to the left. The problem is there's no room for any adjustment because the fit in the oblong hole is really tight so once it's in there's no wiggle at all, so it's slanted with or without the hex screw being screwed in. I'm just wondering if this is a normal thing or if I should go about trying to get them exchanged for another set. Any advice is greatly appreciated.