+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

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 FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Q&A for Cross Armory Castle Nut Wrenches — 4 Questions & 3 Answers

Name Cross Armory Castle Nut Wrenches (4.9)
$16.99 $15.49 Save $1.50
View Product
Write a Review
If you have questions regarding availability, pricing, shipping options for this item or need an answer right now, please contact our customer service team.
Continue As a Guest
Saving...
Sign In or Create an Account (optional)
or Register
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
Q
David G, member, from CA, United States, asked on July 27, 2022

Will this work on a just rite carbine 9 mm

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on July 27, 2022

The Cross Armory Castle Nut Wrench is designed to work with all AR-15 and AR-10 castle nuts and should be able to work on most AR9 platform rifles/pistols as well. However, some AR9 uppers can be proprietary and may use a different barrel nut.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Ted, member, from VA, United States, asked on January 13, 2021

Will this work on a S&W M&P Sport 2?

Expert Answer
A
Answered by Ryan Tarczynski, Gear Expert, from IL, United States, on May 26, 2021

Yes this should work for it.

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
tiny, guest, from NC, United States, asked on September 29, 2020

is this for milspec castle nuts?

A
Answered by Mike B., member, from IL, United States, on December 07, 2020

Yes this is for milspec castle nuts.

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Me, guest, from OH, United States, asked on December 09, 2023

Will this work on a Ruger Precision Rimfire?

Continue As a Guest
Saving...
Sign In or Create an Account (optional)
or Register
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.

Last updated 2025-11-12 UTC.