Aero Precision AR-15 M4E1-E Barreled Upper Receiver 5.56x45mm NATO 14.5" Barrel 12.7" ATLAS R-ONE Handguard with Pinned Epsilon SL Muzzle Device Black

Overview

The Aero Precision AR-15 M4E1-E upper receiver assembly features a 14.5-inch barrel and a 12.7-inch ATLAS R-ONE handguard finished in anodized black. To meet legal length requirements, the included VG6 Epsilon 556SL muzzle device is permanently pinned and welded to the barrel, resulting in a 16-inch overall length. The muzzle device design allows a gas block to slide over it for easy maintenance of the gas system. The M4E1 threaded upper receiver includes a forward assist and port door. It is forged with an enhanced profile and features laser-engraved T-marks and .250 takedown pin holes. The ATLAS R-ONE handguard utilizes a proprietary attachment system designed for durability and a slim profile. This assembly comes complete with a .750 low-profile gas block and a mid-length gas tube. Please note that this upper receiver assembly does not include a bolt carrier group or charging handle.

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