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2A Armament Builder Series Aluminum Castle Nut

2A Armament Builder Series Aluminum Castle Nut, Anodize Black, Small 2A- CNAL-BLK
2A Armament Builder Series Aluminum Castle Nut, Anodize Black, Small 2A- CNAL-BLK
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2A Armament Builder Series Aluminum Castle Nut, Anodize Black, Small 2A- CNAL-BLK

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Questions & Answers
Customer Reviews
Helpful Positive Review
amazing product by notenough, Verified Owner, December 25, 2020
Love the design on this castle nut and end plate. Very durable. Smack it with the back of the screw driver to seat the end plate in place and wiped off at scuffs and there was zero blem. Made with great material. Highly recommend
1/3 found this helpful
Helpful Positive Review
Cool design and lightweight but not as lightweight as listed by JR, Verified Owner, November 17, 2020
This aluminum castle nut weighed more than described in the specifications which is my only complaint, but still very lightweight and cool looking design compared to standard mil spec caste nuts. Machining quality is top notch.
3/3 found this helpful
Helpful Negative Review
There is a reason these are typically steel by Dave, January 24, 2021
I was going for a "light" weight for an LR-308 build. I debated and researched reviews and decided to take a chance.I ran this nut on with a brand new AVID wrench, and was very cautious and watching the teeth to ensure they were engaged. Just as my...
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1/1 found this helpful
Read All 3 Reviews

Code: 2CU-CAN-CNHW-2A-CNAL-BLK

MPN: 2A- CNAL-BLK

UPC: 854299007833

Product No Longer Available

Product Info for 2A Armament Builder Series Aluminum Castle Nut

The Builder Series will offer a vast number of 2A Armament components that have been made with the AR builder in mind. Not only does the Builder Series offer extremely high quality products, but it also offers very competitive pricing.image

This Builder Series Aluminum Castle nut offers weight savings over a traditional steel mil spec castle nut. It features unique machine work to enhance the appearance as well as reduce overall weight. It is light but strong enough to keep your buffer tube secure. It is anodized with the same method as all of our components in order to keep the coloring consistent. This part will allow you to lower the weight and increase the aesthetics of any build.

Features of 2A Armament Builder Series Aluminum Castle Nut

  • Lightweight machined 6061-T6 aluminum
  • Hard anodize finish - Type III Class 2
  • 2 oz

Package Contents:

  • 2A Armament Builder Series Aluminum Castle Nut

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2A Armament Builder Series Aluminum Castle Nut Unavailable & Discontinued Models

List of Unorderable Models

  • 2A Armament Builder Series Aluminum Castle Nut, Anodize Black, Small, 2A- CNAL-BLK , MPN: 2A- CNAL-BLK , UPC: 854299007833 , Code: 2CU-CAN-CNHW-2A-CNAL-BLK
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Last updated 2026-08-26 UTC.