Leapers' scope mount base has a "recoil shock shoulder" in the front (left) that prevents it from shifting--ever! At right, the back of the scope mount base has a cut-out that accommodates the screw at the back of your rifle's original 11mm dovetail.
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Things I liked: Fits my Diana model 54 Air King just right.
Things I liked: The fit on my RWS Model 52 is perfect. I have not shot my gun yet with this mount on due to waiting on my scope rings.
Things I would have changed: I do miss the days of metal.
What others should know: This mount will fit secure on your gun and I can see it not moving.
Things I liked: Changing scopes on my RWS 45 required me to get a picatinny type mount. The on line chat guy suggested this mount. I ordered one and got it quickly from Pyramyd. It mounted easily to my rifle and I didn't have to shim the scope rings like I usually do. The scope sighted in easily and stayed put.
Things I would have changed: Nothing, solid build and easy to install.
What others should know: Use Loctite on your screws and use a quality scope ring. Also you will usually only need medium height rings instead of the high rings. This will give you a good line of sight through the scope
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Will this fit on an old Diana 24 rail ?
Do the numbers on the rail have any use?
Will this work on a 1980's vintage Diana 38?
If it has the dovetail that is raised from the compression chamber, it may fit, but likely will have too much droop compensation to work well