Aero Precision’s M4E1 assembled AR-15 upper receiver is built from 7075-T6 aluminum and finished in black anodizing for a durable, corrosion-resistant foundation. This configuration is made without a forward assist, giving you the cleaner, low-profile option while maintaining standard AR-15 upper compatibility for a 5.56mm NATO build.
Key Features
7075-T6 aluminum receiver construction for strength and rigidity
Black anodized finish for improved corrosion resistance
Assembled upper receiver configuration for a complete upper foundation
No forward assist version for a streamlined build
Build your next 5.56mm NATO AR-15 with a dependable Aero Precision upper receiver designed for standard upper-part compatibility.
