MPN: APAR700301M0 / APAR700701M0


  • Caliber: 5.56 NATO
  • Finish: Type III Class 2 Hardcoat Anodized or Cerakoted Flat Dark Earth
  • Upper Receiver: Aero Precision M4E1 Threaded Upper - 7075-T6 Aluminum
  • Handguard: 7.3-Inch ATLAS S-ONE or R-ONE M-LOK Handguard
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 7.5" 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: 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

*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: ~2.3 lbs.
  • Length: ~16"


  • AR-15 lower receiver


  • 1x Aero Precision 7.5" M4E1 5.56 Complete Upper Assembly


Whether you're looking to build your own AR, or you simply want to customize the look of your existing guns, having a reliable, quality, modular upper assembly is one of the most important parts. We have exactly what you need if you're shopping for a 7.5" AR Upper.

Durable and Dependable

Not only does the new, enhanced forging process give this 7.5" Upper a billet look, but it also means that your upper assembly is made out of some of the most durable and dependable materials on the market. The Type III Class 2 hard-coat finish protects your upper assembly from scuffs, scratches, and any other cosmetic damage.

Atlas R-One and S-One Handguard

In addition to the upper assembly itself being one of the best on the market, it also comes standard with an Atlas Handguard. The top Picatinny rail for optional attachments puts you in even greater control of what kind of attachments you add to your weapon. The quick disconnect sling socket can be set at the 3, 6, and 9 o'clock positions, meaning that you can lock in from virtually any necessary angle.

Have a question?

Ask an Expert

Frequently Bought Together

  • This Item: Aero Precision 7.5" M4E1 5.56 Complete Upper Assembly
    Choose Options
    $509.99 - $544.99

Total Price:

Add to Cart