Aero Precision M4E1 300 Blackout Assembled Upper 16" Barrel Threaded with Rail Mount 15" Handguard Black

Upgrade the performance of your AR15 build with this Aero Precision AR-15 M4E1 Upper Receiver Assembly. 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. All other components are standard to the AR15 platform. This upper assembly does not include a BCG or Charging Handle. Includes: M4E1 Threaded Assembled Upper Receiver ATLAS R-ONE Handguard .750 Low Profile Gas Block and Mid Length Gas Tube A2-style Flash Hider 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