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ADE Advanced Optics 1-Degree Tapered Shim for Red Dot Sights
This optic shim is designed to fit between your red dot sight and the mounting plate to help achieve proper zeroing—especially in situations where the dot remains too high, even with elevation adjustment maxed out.
Fits the Following Red Dot Sights that has a Doctor footprint:
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Burris Fastfire II, III
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Docter/Noblex
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Vortex Venom & Viper
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Insight
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EOTech MRDS
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Sightmark Mini Reflex
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Meopta
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ADE Advanced Optics models: RD3-006, RD3-009, RD3-012, RD3-013, RD3-015, RD3-028
All trademarks mentioned belong to their respective owners. This shim is made by ADE as a mounting accessory and is not affiliated with or endorsed by the brands listed above.
Key Features:
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Corrects Elevation Issues
Ideal when your red dot sight cannot be adjusted low enough to zero properly. The shim raises the rear of the sight to adjust the point of impact downward. -
1.0 Degree Taper
Precision-cut shim with a 1-degree taper and +/- .005 tolerance. -
Elevation Adjustment Aid
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Thicker side at rear: Lowers the point of aim
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Thicker side at front: Raises the point of aim
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Durable & Universal
Designed to work across a wide range of optics and firearms—especially helpful on certain 1911 platforms. -
Quick and Easy Installation
Simply place between the optic and the mounting plate. Re-zero after installation.
What It Solves:
When users are unable to bring the dot low enough due to limited elevation adjustment—this shim lifts the optic slightly to provide additional downward travel for the dot, solving a common "maxed-out elevation screw" issue without returning or replacing the optic. -
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64 Reviews Hide Reviews Show Reviews
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5.0 out of 5 stars Totally worth it even with modifications!
I purchased this knowing that I’d have to make a few refinements- that being said, I couldn’t be happier with the results! I mounted this on a custom P80 Glock 17 and it lined up everything for my Vortex 3MOA red dot perfectly. It didn’t take much to get all the dots and pegs to line up. Yes, you will have to do some carving, but the small $10 investment in this part made my build all come together. For a custom build, you should expect to make modifications to make it all sing in harmony, so for me, this was probably the easiest mod to get the build all running smoothly. Small cuts and patience people! Yeah, try and get this precision making your own 1 degree slice!!
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Exactly what I needed!
I recently installed a red dot sight on my Springfield Armory XDS 9mm. Even at it's maximum adjustment, the shots were consistently hitting low. This shim was the answer. Easy to install and effective to boot! All for about 12 bucks. I submitted a review earlier with a picture of the shim installed and my review was rejected. Sooo.... while Amazon sells the product apparently a review showing the picture of the product installed is not allowed! ANYWAY, I would recommend this product if you're having similar problems. You'll have to take my word for it, cause the picture was just too offensive.
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The right fix for the problem.
Had a Glock 17 G4, using a Vortex Venon. Was still shooting 5 inches low from point of aim after maxing up the UP adjustment. Mounted and recounted a couple of times, no improvement. Purchased the plate, and problem solved. I see reviews about it not fitting, the ad states it may need to be trimmed. Mine was probably a 64th too long on the MOS plate. I used a drill bit that fit snuggly in the existing hole and gently elongated them with just a few twists of the bit by hand, less than 5 minutes of effort. Recovered at least half of my elevation adjustment. Only about 150 rounds in since install, but so far no issues and zero is held.
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Just what was needed to zero in my venom
Elevation adjusting screw ran out of adjustment when trying to zero in the red dot. With the ADE shim plate that issue went away.
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works great
I had to do minor fitting to my PSA Dagger. I had to use an emery board to remove a very small amount of material to the rear of the shim. It was just a little long for the cut on the slide. After this the holes lined up perfectly to the Vortex Venom. Now I can get it sighted in correctly.
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5.0 out of 5 stars Allows zeroing my Vortex Venom
Helps to center the red dot on my Vortex Venom site. It had maxed the adjustment before installing this shim.
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Perfect fix
Used this shim to raise the rear of the Vortex Venom on a CZ 75 SP-01 dove tail plate. Before,it would not zero, the adjust screw was at it's up limit. Now the up/down adjustment has plenty of adjustment between max up and down. Worked like a champ. If you're having the same problem, this will fix it and is worth the price. Thanks Ade Advance optics.
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5.0 out of 5 stars Elevation Problem Solution
Recently I purchased a Vortex Venom red dot sight for my Ruger Mark Iv Lite. However, after mounting it on the pistol, I found it impossible to zero, as it ran out of elevation. In my frustration, I contacted Vortex and they suggested an ADE Advanced Optics shim placed between the mounting plate and the sight as a solution. Voila, my elevation problem was solved and my frustration ended.
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5.0 out of 5 stars Solved my problem
Just purchased a Vortex Venom Red Dot Optic for my Springfield XDM. Installed the Optic went to the range to zero in the red dot and ran out of elevation adjustment. Thought I would have to send my Optic back. I googled the issue and was directed to amazon. On Amazon they stated the ade shim would solve my problem. Fortunately I have Amazon Prime got the shin overnight free shipping. Took about 5 minutes to install Drove to the range and zeroed in the optic. Great solution to my issue. Problem solved.
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Solve my Vortex Venom problems!!!
Bought a venom and tried it on my shotgun… shot 4-5” low with the dial maxed out. Tried it on my 22/45… shot dead on, but also with the dial maxed out. Tried this product and it fixed the problem! With it installed on my 22/45, I was able to back off the dial almost 2 full rotations = 50 clicks = 50 moa!!! Doing online research, I found this a very common problem with the Venom. I even contacted Vortex and the said to use a shim. Vortex should just include this shim with ALL their Venoms!
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5.0 out of 5 stars Totally worth it even with modifications!
I purchased this knowing that I’d have to make a few refinements- that being said, I couldn’t be happier with the results! I mounted this on a custom P80 Glock 17 and it lined up everything for my Vortex 3MOA red dot perfectly. It didn’t take much to get all the dots and pegs to line up. Yes, you will have to do some carving, but the small $10 investment in this part made my build all come together. For a custom build, you should expect to make modifications to make it all sing in harmony, so for me, this was probably the easiest mod to get the build all running smoothly. Small cuts and patience people! Yeah, try and get this precision making your own 1 degree slice!!
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5.0 out of 5 stars Exactly what I needed!
I recently installed a red dot sight on my Springfield Armory XDS 9mm. Even at it's maximum adjustment, the shots were consistently hitting low. This shim was the answer. Easy to install and effective to boot! All for about 12 bucks. I submitted a review earlier with a picture of the shim installed and my review was rejected. Sooo.... while Amazon sells the product apparently a review showing the picture of the product installed is not allowed! ANYWAY, I would recommend this product if you're having similar problems. You'll have to take my word for it, cause the picture was just too offensive.