Top takeaways
- The Echo Zulu Castle Nut is made from high-quality 4140 PH alloy steel with a black nitride finish for durability.
- It is precision machined to meet or exceed mil-spec tolerances, featuring true class 3 threads and eight staking notches.
- 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
- Weapon type:
AR-15
- Delivery weight: 0.141kg
- Shipping height: 3mm
- Shipping width: 76mm
- Shipping length: 171mm
- UPC: 197644954728




