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Questions & Answers
what is the height of this scope ring? Can't seem to find that info. Expert Answer

Unfortunately, Ruger does not provide a specific centerline height measurement for this scope ring. They state it will be compatible with up to a 42mm objective lens.

by Ethan, Gear Expert, December 10, 2025
For a Ruger m77, mounting a vortex 6.5x20 44mm objective 30mm tube. Am I correct that I’d need the 90273 and the 90274 rings? Expert Answer

The Ruger 30mm Medium Scope Ring is stated by Ruger, will only support objectives lens up to 42mm in size. I would recommend the Leupold Ruger Rifle Scope Mount Rings found using the following link:
https://www.opticsplanet.com/leupold-ruger-rings.html?_iv_gun-model=ruger-m77&_iv_tube-diameter=30-mm&_iv_ring-height=medium

by Ethan, Gear Expert, March 28, 2022
Customer Reviews
Helpful Positive Review
Mr. G Winlund by Gary, February 6, 2015
On Ruger Rifles I use only rings because they stay tight, and re-register if you need to remove the scope. I've had them on at least a dozen rifles over the years and never experience a failure. I tried someone else s product about ten years ago wi...
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1/1 found this helpful
Helpful Positive Review
Ruger Scope Ring 4B30 by roberttice, Verified Owner, July 23, 2013
This is the second set of factory Ruger scope rings I have owned.The fit and finish is great.They stay tight and hold zero.The first set were 1 inch and were on a Ruger PC9 carbine.I am upgrading to a 30mm Matchdot 2. Pros: none. Cons: Easy to put on...
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1/1 found this helpful
Helpful Positive Review
Work as described by Legacy Reviewer, February 16, 2013
Works as decribed! They take an otherwise useless scope and hold it directly on my rifle for ease of use. No more shall I resort to holding the scope in one hand and the rifle with the other. A real game changer. Pros: They hold the optic onto my rif...
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2/6 found this helpful
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Product Info for Ruger Single Scope Ring - 4B30 Medium Blue 30mm 90273

Ruger 4B30 Medium 30mm Scope Ring 90273 is yet another item in Ruger's dense collection of quality rifle scope rings. This Ruger riflescope ring will not only mount your scope securely, it also has an attractive matte blue finish, so your scope is mounted in style as well. This rifle scope ring has been designed to fit scopes with a tube diameter of 30mm and an objective lens diameter of 42mm. The medium profile of the Ruger 4B30 30mm Blue Scope Ring allows you to combine low profile accuracy with the wider objective lens-sized rifle scopes that higher profile mounts can accommodate. Ruger has a track record of tight design, especially in their rings, which can now be combined with other Ruger rings for the perfect fit for your weapon and shooting style. Mix and match the Ruger 4B30 Blue Medium Rifle Scope Ring to customize your mounting platform of choice.image

Specifications for Ruger 4B30 30mm Rifle Scope Ring:

Objective Lens Diameter: Up to 42mm
Tube Diameter: Up to 30mm
Finish: Blue

Features of Ruber 4B30 Rings:

  • Medium profile rifle scope ring
  • Blue finish
  • Fits a maximum objective lens diameter of 42mm
  • Fits a max tube diameter of 30mm
  • Interchangeable with other Ruger rings

Package Contents:

  • Ruger 4B30 Medium 30mm Scope Ring 90273
WARNING: California`s Proposition 65

Ruger Single Scope Ring - 4B30 Medium Blue 30mm 90273 Orderable Models

List of Orderable Models

  • Ruger Scope Ring 4B30, 30mm, Hawkeye Rifle, Blue Finish, Single,Medium Profile 90273 , MPN: 90273 , UPC: 736676902736 , Code: RT8-RR-90273-EE
  • DEMO, Ruger Scope Ring 4B30 Medium Hawkeye Blue,Single 90273 , MPN: 90273-DEMO , Code: RT8-RR-90273-DEMO-OB-A
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