Top takeaways

  1. The Echo Zulu Castle Nut is made from high-quality 4140 PH alloy steel with a black nitride finish for durability.
  2. It is precision machined to meet or exceed mil-spec tolerances, featuring true class 3 threads and eight staking notches.
  3. Designed for easy and consistent staking, it can be used with the Echo Zulu Starter Kit or armorer’s wrench, minimizing risk to other components.

Attributes

Make: AR-15 Delivery weight: 0.141kg

Item details

Made in USA