ERGO AR-15 Castle Nut 4971

Ergo Grip
874748005333
4971
ARR-875-047
$5.00
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Machined from 4140 steel with a durable manganese phosphate coating, the Ergo Grip Castle Nut is an excellent replacement part or is ideal when building new rifles.

Features and Specifications:
Manufacturer Number: 4971
Machined from 4140 steel
Manganese phosphate coating 

Item#: ARR-875-047