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

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

Product Code:
Calculated at Checkout
$489.99 $425.99

MPN: APAR700204P7 / APAR700205P7 / APAR700304M7 / APAR700305M7


  • Caliber: 5.56 NATO
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Aero Precision M4E1 Threaded Enhanced Upper - 7075-T6 Aluminum
  • Handguard: 12.56" or 14.95" ATLAS S-ONE Handguard of choice (KeyMod or M-LOK)
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 16" 1:7 QPQ Coated 4150 Crome Moly Vanadium
  • 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

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


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


  • AR-15 lower receiver


  • 1x Aero Precision 16" M4E1 5.56 Mid-Length Complete Upper Assembly
  • 1x Barrel Nut Wrench
  • 1x Torx Wrench


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.

NOTE: For the protection of our customers and various safety and legal liability reasons, we do not accept returns on ammunition, firearms, barrels, or any product that contains a barrel. Defective firearms, barrels, any product that contains a barrel (i.e., complete AR-15 uppers, complete pistol slides, etc.) and ammunition must be returned to the original manufacturer for warranty service. You can have peace of mind that all firearms, barrels, complete uppers, and ammunition that we sell are brand new from the manufacturer, and have never been used, installed, or modified.

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