Aero Precision M4E1 Assembled Upper Receiver 5.56

Aero Precision M4E1 5.56mm Upper Receiver Features The M4E1 upper receiver stands out with its integrated handguard mounting platform eliminating the need for a separate barrel nut and simplifying the build process. This design allows for a more rigid interface between the handguard and upper improving accuracy and alignment. The included barrel nut and proprietary barrel nut wrench ensure seamless compatibility with Aero's ATLAS and Enhanced handguards. The port door assembly is factory-installed minimizing the time and effort required for assembly and guaranteeing correct fitment. Forged from 7075-T6 aluminum and finished in either hardcoat anodized black or Cerakote FDE the M4E1 upper is built to endure hard use while offering a striking look. The absence of a forward assist not only reduces weight but also supports a minimalist design favored by many modern rifle builders. The upper retains full compatibility with all mil-spec lower receivers and bolt carrier groups offering flexibility whether you're building a custom firearm or upgrading an existing rifle. Designed for the experienced builder and the enthusiast alike the M4E1 Enhanced Upper Receiver embodies Aero Precision's commitment to quality and innovation. The precision-machined barrel extension and M4 feed ramps ensure optimal feeding performance while the robust mounting system provides a rock-solid foundation for accessories and optics. Whether you are developing a precision AR-15 a lightweight carbine or a duty-grade platform this upper delivers strength modularity and style in one streamlined package. Aero Precision M4E1 5.56mm Upper Receiver Specifications Manufacturer: Aero Precision Model: M4E1 Enhanced Upper Receiver Caliber: 5.56mm NATO / .223 Remington Construction: 7075-T6 Aluminum Finish: Anodized Black or Cerakote FDE Forward Assist: Not Included Feed Ramps: M4 Feed Ramp Extension Port Door: Included and Pre-Installed Barrel Nut: Included (Proprietary Design) Barrel Nut Wrench: Included Handguard Compatibility: ATLAS and Enhanced Handguards Only T-Marks: Laser Engraved Assembly Type: Complete Upper Receiver (No BCG or Charging Handle) Compatibility: Works with all standard AR-15 lowers and mil-spec components