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Reviews & Ratings for Luth-AR Carbine Lock Ring/Castle Nut — 4 reviews

(4 reviews)
Luth-AR Carbine Lock Ring/Castle Nut
Luth-AR Carbine Lock Ring/Castle Nut
$5.05 $4.99
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It's a castle nut!

by Rick, Verified Owner from CO, United States Written on February 13, 2025
It will make your setup shoot MOA all day. Just kidding. It's a simple part, but it fits well and it's a great price. Threaded up perfectly to my American Def. Mfg tube.
Pros:
  • Lightweight
  • cost
  • Fit
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
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Awesome product

by Gabe Smith, Verified Owner from AL, United States Written on October 24, 2023
Awesome product, works as it should. Will buy again
Would recommend: Yes
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Steel, fits commercial-spec

by Dan, Verified Owner from WA, United States Written on June 22, 2021
Threads easily onto the LUTH-AR Commercial-Spec buffer-tube/receiver extension (wasn't sure it would because nothing is listed anywhere saying that fits one spec or the other specifically) that I also purchased. Sharp, clean threads and steel what more could you ask for?
Would recommend: Yes
Was it helpful to you? Yes | No
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It's a castle nut

by HasH, from MN, United States Written on March 4, 2021
The black finish matched my built quite nicely and it works as a castle nut should without a problem at all. So, no complaints from me and I'm sure I'll end up buying more if needed. Thanks OpticsPlant
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.