Aero Precision M4E1 Enhanced AR15 Upper Receiver Assembly

The Aero Precision M4E1 Enhanced AR15 Upper Receiver Assembly is a versatile and robust component designed for AR-15 enthusiasts seeking precision and reliability. Engineered from high-strength 7075-T6 aluminum, this one-piece upper receiver integrates the handguard mounting platform directly into its construction, eliminating the need for a separate component. Its M4 feed ramps and .250 takedown pin holes ensure compatibility with standard AR-15 parts, while supporting barrels up to 1 inch in diameter. The assembly includes a barrel nut, wrench, port door, and forward assist. Finished with a black hard coat anodized handguard and black anodized receiver, it offers a sleek and durable appearance. Note that this upper is not compatible with piston kits and requires additional components like a charging handle, barrel, handguard, gas block, muzzle device, gas tube, and BCG to complete the build. It is optic ready, allowing for customization to suit various shooting needs.