MPN: APAR640251M6 / APAR640251M7


  • Caliber: 5.56 NATO
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Aero Precision M4E1 Enhanced Upper - 7075-T6 Aluminum
  • Handguard: 15-Inch Gen 2 Enhanced M-LOK Handguard
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 16" 1:7 QPQ Coated 4150 Chrome Moly Vanadium Barrel
  • Muzzle Thread Pattern: 1/2"-28 TPI
  • Gas Block: Aero .750" Low-Profile Gas Block
  • Gas Tube: Carbine or Mid-Length Gas Tube
  • Bolt Carrier Group: Not Included
  • Charging Handle: Not Included
  • HP and MPI Tested

*This upper assembly does not come with Bolt Carrier Group and Charging Handle


  • Weight: ~3.45 lbs.
  • Length: ~24.4"


  • AR-15 lower receiver


  • 1x Aero Precision 16" 5.56 M4E1 Enhanced Complete Upper Assembly


If you are looking to build an all-purpose AR-15 that can be used for self-defense, range shooting, and competition, the Aero Precision 16" 5.56 M4E1 Enhanced Complete Upper Assembly is an excellent option. It includes a 16-inch barrel, modern handguard, high-quality receiver, and a low-profile gas system.

Made From High-Quality Material

The barrel is made from Mil-Spec CMV (Chrome Moly Vanadium) steel, which increases its strength, and high-temperature resistance as well. The barrel is also QPQ coated for longevity. The barrel has a 1/2"-28 thread pitch and comes with an A2 style flash hider.

Enhanced Handguard

The handguard on this upper assembly is an Aero Precision 15-Inch Gen 2 Enhanced M-LOK Handguard. It has M-LOK slots at 3, 6, and 9 o'clock, and a full-length Picatinny rail on top. The handguard is firmly mounted on the receiver with its built-in anti-rotation table and one-piece design and offers an excellent platform for mounting accessories and optics.

The receiver itself is forged from Aircraft grade aluminum and is very lightweight. It has a forward assist and a port door and features M4 feed ramps for better reliability. It is the perfect option for an all-purpose AR-15 build.

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