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Ruger Weaver-Style Scope Base Adapter for Mark I, II, III Pistols 90224
$40.46 $29.99 Save 26%
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Most Helpful Positive Review Fair price & only available at Optics Planet
I have a Ruger Mark IV Hunter which is stainless. I searched the web extensively trying to find a silver scope adaptor, but the only ones I could find were black. I saw this on Optics Planet, but it said it would work on the Mark I, II, and III, but it did not mention the Mark IV. I took a chance...
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Most Helpful Negative Review Not compatible with Fastfire III red dot
All was good until I mounted my new Burris Fastfire III red dot sight. The grooves that run across the Weaver style base adapter are not deep enough to fully accomodate the bar acrossthat runs across the clamp of the sight. The sight rocks back and forth and will not sit fully flat on the adapter....
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excellent all around

by tjc550m, from FL, United States Written on January 2, 2019
another great opticsplanet experience

rail is as expected, perfect fit, etc

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Would recommend: Yes
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Mark IV Weaver Rail

by Shooter22, from CO, United States Written on December 14, 2016
This rail fits perfectly on my Mark IV Hunter, good price and made from Aluminum. There are no issues with this product and I would recommend it for you Ruger Mark IV Hunter. These guys are great with returns also , so if you are unhappy they honer that.
Pros:
  • Fits perfect
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

review of weaver style scope adapter for Mark I, II, III handguns

by Rick, Verified Owner from TX, United States Written on December 18, 2015
I ordered the weaver style base to mount a burris fastfireIII on my
ruger 22/45 MkIII .22 semi auto pistol with a 4" threaded bbl. the base seems durable / sturdy and well made. it comes with the three screws needed to mount the base to the handgun. the description of the base says "clear" the base is actually silver colored. the base holes lined up perfectly with the holes in the receiver, but the base was too long for the four inch bbl with the existing front ramp sight. I remedied this by cutting approx 1/4" off the base nearest the front sight with a dremel tool.with the modification the base mounts the fastfire solidly to the gun.
Pros:
  • versatile base
Cons:
  • requires some modification / some guns
Best Used for:
  • its a rail to mount a sight!!
Would recommend: Yes
Was it helpful to you? Yes | No

Great looking but there are a few nitpicks

by Lanzer, from CA, United States Written on December 24, 2014
Great looking scope that shows exceptional quality. Perfect if you plan to never remove your scope. Though as a design decision all the rail grooves are rounded instead of squared. If you have scope rings that have square indexes then they won't work with this rail. Secondly, the spacing of the grooves doesnt match the picatinny standard, which means you'll need to move your scopes back and forth if you're moving scopes around.
Pros:
  • Quality
Cons:
  • Non standard
Would recommend: No
Was it helpful to you? Yes | No

Ruger Weaver-style mount

by Legacy Reviewer, Verified Owner from TN, United States Written on February 8, 2013
If they would put a drop of locktite on the screws prior to packaging,it would help.
Pros: easy to install.
Cons: must have small screw-driver and locktite,
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.