MPN: APAR700301M1 / APAR700701M1


  • Caliber: .300 Blackout
  • Finish: Type III Class 2 Hardcoat Anodized or Cerakoted Flat Dark Earth
  • Upper Receiver: Aero Precision M4E1 Upper Receiver - 7075-T6 Aluminum
  • Handguard: 7.3-Inch ATLAS S-ONE M-LOK Handguard or ATLAS R-ONE M-LOK Handguard
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 8" 1:7 QPQ Coated 4150 Chrome Moly Vanadium
  • Muzzle Thread Pattern: 5/8"-24
  • Gas Block: Aero .750" Low-Profile Gas Block
  • Gas Tube: Pistol-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

*This upper receiver assembly has a barrel that is shorter than 16". This upper is only for use on AR pistol lower receivers and NFA registered Short-Barreled Rifle (SBR) lower receivers. All NFA laws apply!


  • Weight:
    • with ATLAS S-ONE Handguard: ~2.29 lbs.
    • with ATLAS R-ONE Handguard: ~2.28 lbs.
  • Length: ~16.38"


  • AR-15 lower receiver


  • 1x Aero Precision M4E1 8" 300 Blackout Complete Upper Assembly


Aero Precision's AR-15 300 blackout upper is the ideal choice for serious shooters seeking the best foundation to support their individual tactical needs.

Ready To Support Your Tactical Needs

The AR-15 300 blackout upper is made with a new forging technique that provides a very tactical "billet look".

Aero Precision's ATLAS Handguard is included so that you can mount your accessories of choice on a durable platform without adding excessive weight and while keeping your AR's figure slim.

This upper does not arrive with a charging handle or bolt carrier group, so you can save money and choose your preferred parts to make this upper all your own.

Made For Ultimate Durability

Aero Precision wanted to give their customers an upper that they could confidently rely on for years to come, so they strategically chose durable materials to craft the upper with.

The upper is made from 7075-T6 Aluminum, and the barrel is made from 4150 Chrome Moly Vanadium, QPQ Coated. Then the upper is covered with a Class 2 Type III Anodized Hardcoat Finish to maximize its useful life.

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  • This Item: Aero Precision M4E1 8" 300 Blackout Complete Upper Assembly
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