LUTH-AR offers replacement components for the AR-15 that are made to strict military specifications. These high quality components will provide excellent fit and reliable function in your AR series rifle and are perfect for upgrading existing components or replacing worn or broken parts.

LUTH-AR's steel castle nut id a great way to finish off your carbine. Machined from 4140 steel with a manganese phosphate coating, the Carbine Castle Nut/Locking Ring is an excellent replacement part or is ideal when building new rifles.

Features and Specifications
Manufacturer Number: CS-02
Steel castle nut
Works with commercial, military and hybrid buffer tubes
Virtually indestructible