Aero Precision AR-15 M4E1 Upper Receiver Assembly 5.56x45mm 16" Barrel Mid-Length Gas System Black

This Aero Precision M4E1-T Complete Upper includes the ATLAS R-ONE Handguard. The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. Features Enhanced forging that gives the upper receiver a "billet look" Picatinny profile that blends seamlessly with Enhanced Series Handguards .250 takedown pin holes Laser engraved T-marks Includes port door and forward assist installed Note: Does not include BCG and charging handle