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WMD Guns Castle Nut
As Low As $6.49 Save Up to 51%
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Most Helpful Positive Review Great product
A great looking castle nut that threads on easy. Machining is perfect and so is the Nitride finish that matches other Nitrided parts. This is the best looking steel castle nut for the money.
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avoid the nitride

by Juan Rodriguez, Verified Owner from TX, United States Written on April 16, 2026
The NiBx coated castle nut looks great on a build. It's sharp, clean, and stands out.
The nitride coated version is underwhelming. There's barely any difference between a mil spec castle nut and the nitride version.
Save yourself the aggravation and stick to the NiBx.
Would recommend: Yes
Was it helpful to you? Yes | No

Nice fit and finish

by Patriot, Verified Owner from TX, United States Written on September 11, 2024
I’ve purchased the nitride WMD castle nut many times and they always have a nice fit and finish in a consistent shade of black.

Much nicer looking than the average mag phosphate castle nut.

Compared to significantly more expensive nitride options, I think this is a fantastic value and adds a subtle classy touch. Will purchase more.
Pros:
  • value
  • Fit and finish
Cons:
  • None
Best Used for:
  • AR Platform
Would recommend: Yes
Was it helpful to you? Yes | No
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