MPN: APAR700304M14 / APAR700305M14 / APAR700704M14 / APAR700705M14


  • Caliber: .300 Blackout
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Aero Precision M4E1 Threaded Upper Receiver - 7075-T6 Aluminum
  • Handguard: 12-Inch or 15-Inch ATLAS S-ONE M-LOK Handguard or ATLAS R-ONE M-LOK Handguard
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 16" 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

*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:
    • with 12" ATLAS S-ONE Handguard: 3.19 lbs.
    • with 15" ATLAS S-ONE Handguard: 3.26 lbs.
    • with 12" ATLAS R-ONE Handguard: 3.27 lbs.
    • with 15" ATLAS R-ONE Handguard: 3.33 lbs.
  • Length: ~24.38"


  • AR-15 lower receiver


  • 1x Aero Precision M4E1 16" 300 Blackout Complete Upper Assembly


Aero Precision's 16" 300 Blackout upper is the ultimate upper for shooters seeking durability they can rely on and a multitude of possibilities for tactical attachments to enhance their shooting experience.

Groundwork For Customization

By starting with a low-profile upper, you gain the freedom to add attachments that support your mission to improve your shooting experience. Designed to be as low profile as possible, shooters with major tactical plans for their weapon appreciate that this upper features a pistol-lenght gas tube and a low profile gas block.

This Aero Precision upper includes their ATLAS Handguard. This M-LOK rail is the perfect base for adding attachments of your choice to customize your weapon. Aero Precision's ATLAS attachment system is strategically engineered to be a slim profile yet durable mounting platform that you can rely on.

Compatible with AR-15 lower receivers, bolt carrier group, and charging handle, this upper is appropriate for various AR-15 upgrades.

Manufactured For Durability

When you purchase this Aero Precision's 16: 300 Blackout upper, you can be confident that it will serve you well for years to come.

The barrel is made of 4150 Chome Moly Vanadium then coated with QPQ Corrosion Resistant Finish. The upper is made of 7075-T6 Aluminum, Type III, Class 2, then coated with hard coat anodized finish. Aero Precision strategically made this complete upper to give you a durable upper that you will rely on for years to come when defending your family and punching holes in the bullseye at the range.

The upper arrives assembled, streamlining your installation process, getting you to the range to test it out faster. Note that this upper does not include a Bolt Carrier Group or a Charging Handle.

Aero Precision offers you this low-profile upper without sacrificing style or quality. Manufactured with an upgraded forging method, this upper has a unique "billet look".

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