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10/31/2015 3:07:25 PM EDT
I have been using a B Square one piece mount with a 3x9 40 power scope for years. I just got an ARMS 40 sight and found its about .010 of an in to tall for my scope to clear it. Any recommendations on a mount that will clear it? My scope is a 1".
11/1/2015 10:25:47 AM EDT
[#1]
It's all a math equation. Unlikely anyone will have your identical setup.  You need to know the exact outside diameter of your scope eyepiece and the exact folded height of the rear sight.  That will permit you to solve for the mount height, being the distance from the centerline of the scope to the top of the rail.

1.  You take the mount height from centerline of the mount (not saddle height).  If the mount uses horizontal split rings, you can measure from the split to the top of your rail.  Write that number down.

2. Next, you talke your scope eyepiece outside diameter and divide by two.  That is the distance it will come down, once mounted, toward the rail.  Write that down.

Now, subtract the number you wrote down in step 2 from the number you wrote down in step 1.

The result is how much clearance you have between your scope and rail top.

If that number is larger than the folded height of your rear sight, the mount will work.  If it is less, there will be interference and it will not fit.

I am totally unfamiliar with the height of the B-Square mount or of your folded ALMS, but this formula will work with any combo.

Do the math. Most one piece cantilever mounts fall between 1.4" and 1.5" from centerline to rail, and that dimension is usually posted on their website for each mount.
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