I got the Tech Sights Mini200 sights for my Mini 14 (58x) series. The sights are great and much easier to setup than the stock ones. But there is one thing that seems off about them. There is a small gap between the guns receiver and the bottom of the tech sights body. Is this normal? It seemed to be flush fit until I tighten the top flat screw. Then the sight shifts up. Its a small issue, I'm really just checking that I did install it correctly. It just seems odd though. I included a picture.