Looking for a high-quality and durable AR-15 upper receiver assembly? Look no further than the Aero Precision M4E1 Enhanced AR-15 Upper Receiver Assembly! This top-of-the-line upper receiver assembly is crafted from a 7075-T6 aluminum forging machined to MIL-SPEC standards, and finished in a tough and protective flat dark earth Cerakote. The M4E1 Enhanced Upper Receiver incorporates the handguard mounting hardware with the upper receiver into a single forging, saving weight and improving cooling efficiency. It’s compatible with all MIL-SPEC AR-15/M16 components and is sure to function flawlessly under even the most strenuous conditions. Give your AR-15 the upgrade it deserves.
NOTE: Compatible with Aero Precision Enhanced and Quantum Series handguards. Also fits most BAR-system handguards. Barrel nut and wrench are included. This upper receiver is not piston-kit compatible. Supports barrels up to 1″ in diameter.