MPN: APAR700304M7 / APAR700305M7 / APAR700704M7 / APAR700705M7


  • Caliber: 5.56 NATO
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Aero Precision M4E1 Threaded Upper - 7075-T6 Aluminum
  • Handguard: ATLAS S-ONE or R-ONE Handguard of choice
  • 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: 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

*ATLAS S-ONE Handguard: Front and rear picatinny rail section. Eliminated center of top rail for weight reduction.

*ATLAS R-ONE Handguard: Full top picatinny rail


  • Weight:
    • M4E1 Upper with 12" Handguard: 3.26 lbs.
    • M4E1 Upper with 15" Handguard: 3.31 lbs.
  • Length: 24.33"


  • AR-15 lower receiver


  • 1x Aero Precision 16" M4E1 5.56 Mid-Length Complete Upper Assembly


This Aero Precision AR-15 complete upper assembly is designed to withstand the rigors of combat while at same time providing unmatched quality. Life can be harsh at times. You may find yourself in a situation where your only hope of escape is your AR15. Don’t risk your life or the lives of your loved ones by settling for cheap rifle parts when building your AR.

This upper receiver assembly is machined from 7075-T6 aluminum to meet the rigorous standards set in place by Aero. These standards are so rigorous that they far surpass all military requirements for the same product. The seamless receiver and ATLAS S-ONE top handguard rails offer an extremely solid base for optimal receiver performance and maximum accessory options.

This AR-15 barreled upper assembly by Aero Precision include a 4150 CrMoV steel barrel chambered in 5.56 NATO. Bolt carrier group and charging handle are not included in this Aero Precision upper assembly, so you can choose the parts that suit you the best. Order your complete upper today to make your dream rifle the best it can be.

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  • This Item: Aero Precision 16" M4E1 5.56 Mid-Length Complete Upper Assembly
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