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NBS Mil-Spec Carbine Receiver Extension (Castle) Nut

NBS Mil-Spec Carbine Receiver Extension (Castle) Nut

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$3.95

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Updated

Dec 17, 2025

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Specifications

MPN

AR15-LP-057

Description

Mil-spec carbine castle nut/lock ring for securing lock plate on an adjustable stock for AR-15, M4.

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