Description
Mil-spec carbine castle nut/lock ring for securing lock plate on an adjustable stock for AR-15, M4.
Additional information
| Weight | 0.64 oz |
|---|---|
| Dimensions | 0.41 × 1.38 × 1.38 in |
| MPN | AR15-LP-057 |
| UPC | 999991339 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
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Adam C. 
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Customer Reviews
4.9
Based on 83 Reviews
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AC
US
12/21/2025
Buffer nut
Great quality and fit
WH
US12/22/2024
Ar-15 bolt nut
Great quality, strong metal , very cheap price
JY
US02/01/2023
NBS Mil-Spec Carbine Receiver Extension (Castle) Nut
you can't go wrong with this.
CP
US09/07/2022
As expected good part good price
Great product for great price
EG
US06/04/2022
Castle Nut Works
Nice castle nut, works as expected.
