Aero Precision AR-15 M4E1-E Barreled Upper Receiver 300 AAC Blackout 8" Barrel 7.3" ATLAS R-ONE Handguard Black

Overview

The Aero Precision AR-15 M4E1-E Barreled Upper Receiver is a complete, assembled upper chambered in 300 AAC Blackout. It features an 8-inch CMV barrel with a 1:7 twist rate, paired with a 7.3-inch ATLAS R-ONE handguard. The ATLAS system utilizes a proprietary attachment platform designed for a slim profile, strength, and stability, offering ample M-LOK real estate for accessories. The assembly includes an M4E1 threaded upper receiver, a low-profile gas block, and a pistol-length gas tube. The receiver is finished in anodized black and incorporates features such as a forward assist, a port door, laser-engraved T-marks, and a Picatinny profile designed to blend seamlessly with the handguard. This complete upper does not include a bolt carrier group or charging handle. It is compatible with standard AR-15 lower receivers.

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