Aero Precision M4E1 5.56mm Assembled Upper Receiver 10.5" Barrel Carbine with 7" Handguard and FSB

Upgrade the performance of your AR15 build with this Aero Precision AR-15 M4E1 Upper Receiver Assembly. The Enhanced Handguards provide a lightweight free float design for your custom AR15 build. The EM system features M-Lok slots for advanced modularity and customization. Machined to mil- spec dimensions and engineered to perfection, these handguards eliminate bulk while retaining strength and stability. All other components are standard to the AR15 platform. This upper assembly does not include a BCG or Charging Handle. 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