B.A.D. AR/M16/M4 Receiver Extension Lock Nut / Castle Nut

B.A.D. AR/M16/M4 Receiver Extension Lock Nut / Castle Nut

Overview

The Battle Arms Development AR/M16/M4 Receiver Extension Lock Nut is a precision-machined castle nut engineered for secure, reliable retention of your buffer tube assembly. Designed for builders who value fit, consistency, and high-quality components, this lock nut delivers dependable performance on any AR-15/M16/M4 pattern lower.

Features

• Precision-machined castle nut for AR-15/M16/M4 platforms
• Ensures solid, consistent retention of the receiver extension
• Ideal upgrade or replacement for OEM castle nuts
• Compatible with standard AR-15/M16/M4 receiver extensions

Why Builders Choose This Castle Nut

Battle Arms Development components are known for their attention to detail, and this lock nut is no exception. Its clean machining and reliable geometry make it an excellent choice for fresh builds, maintenance, or upgrades where long-term durability and proper alignment matter.