Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart

Does the "30 mm" measurement refer to the diameter of the opening in the ring? — 2 Answers

by Larry, from TX, United States Asked on December 3, 2017

Name Ruger Scope Ring - SINGLE 5B30 High Blue 30mm 90274 (4.8)
$64.99 $43.89 Save 32%
View Product
Continue As a Guest
Saving...
Sign In or Create an Account (optional)
Why use an OpticsPlanet.com account for my questions and answers?

Having an account with OpticsPlanet.com makes writing questions and answers even better! We’ll save all of your questions and answers in your account, provide you easy access to them, so you can see how the community has responded.

If you’d like to add a question without creating an account, you can proceed with filling out the fields on this form.

Show
Sort by
Filter by
Expert Answer
A
Answered by Matt S., Gear Expert, from IL, United States, on December 21, 2017

Yes. This ring is meant for scopes with a 30mm tube diameter

Was it helpful to you? Yes | No
Expert Answer
A
Answered by Mark H., Gear Expert, from IL, United States, on December 20, 2017

Yes, the ring is intended for use with riflescopes that have a 30mm main tube diameter.

Mark H.

Was it helpful to you? Yes | No