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Discussion Starter · #1 ·
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.

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Something isn't right. We're the side screws loose when you installed it?

Picture of mine.
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Discussion Starter · #5 ·
Update:
I was able to fix the issue by shimming the sight body at the very front. I used the thinnest shim I could find at about 0.01 inches. I then cut it in half and glued it to the underside of the sight body. After reinstalling, the gap is now gone. Just so others know one quick way to fix this issue. Also I have a brand new Mini14 so maybe the manufacturing process changed a little. Let me know what you think. Pics included.

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Discussion Starter · #7 ·
Yea this is a brand new 584. So im not sure who changed their tolerances but I have a feeling it was Ruger. I know they stopped producing the Mini 14 during Covid for a while. Maybe these are new manufacturing machines or something.
 

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IIRC, the receiver is an investment casting, and not all surfaces need to be held to tight tolerances. Possibly those surfaces in way of the Techsight are among those with greater tolerances. Glad that you were innovative and got it fixed for a minimum of hassle and expense.
 

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Yea this is a brand new 584. So im not sure who changed their tolerances but I have a feeling it was Ruger. I know they stopped producing the Mini 14 during Covid for a while. Maybe these are new manufacturing machines or something.
Thanks for posting this, I noticed because of your post, I have the same issue and this could be why I'm having trouble getting the sight aperture low enough, I'm bottoming out on the adjustment by the time I get a zero. I didn't notice the gap being there when first fitted, but now checking it after seeing your post, there it is, I guess it was when I tightened the screw down that it opened up and I just didn't notice. Mine is a 584, but close to 2 years old now. The sight was originally a tight fit on the receiver, I had to push it hard to the front to get the screw to line up, so it would go in, it didn't occur to me, it could move as I tightened. It's loosened up of late, I think the side grub screws have stretched it out a little under tightening. I made a shim from a very soft piece of stainless steel I had in my garage, this dropped the rear down quite a bit to sit on the receiver, so hopefully I will now have the elevation adjustment, without it bottoming out. Now I really look at the sight it is an ugly fit to the receiver, not really impressed at all for the price.
 
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