MPN: APAR620101M85 / APAR620103M86 / APAR620105M87 / APAR620701M85 / APAR620703M86 / APAR620705M87 / APAR620708M84


  • Last round bolt hold open mechanism
  • Caliber: 9mm
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Aero Precision Enhanced Pistol Caliber (EPC-9) Upper w/ LRBHO - 7075-T6 Aluminum
  • Handguard: ATLAS S-ONE or R-ONE M-LOK Handguard of choice
  • Muzzle Device: A2 Flash Hider
  • Barrel: 1:10 twist, QPQ Coated 4150 Chrome Moly Vanadium Barrel
  • Muzzle Thread Pattern: 1/2"-28 TPI
  • Bolt Carrier Group: Not Included
  • Charging Handle: Not Included
  • Available in 5.5", 8.3", 11", and 16" barrel length
  • ATLAS R-One Handguard has full top Picatinny rail for optional attachments
  • ATLAS S-One Handguard eliminated center of the top rail for weight reduction

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

*The muzzle device included with this complete upper receiver is NOT pinned nor welded to this barrel.

* A barrel that is shorter than 16" is only for use on a pistol configuration firearm or an NFA-registered Short-Barreled Rifle (SBR). All NFA laws apply!

NOTE: The EPC last round bolt hold open is ONLY compatible with appropriate GLOCK® pattern magazines.


  • Weight:
    • 5.5-Inch Barrel: 1 lb. 8.4 oz.
    • 8.3-Inch Barrel: 1 lb. 13.8 oz.
    • 11-Inch Barrel: 2 lb. 3.3 oz.
    • 16-Inch Barrel: 2 lb. 12.2 oz.
  • Handguard Length:
    • 5.5-Inch Barrel: 4.8-Inch
    • 8.3-Inch Barrel: 7.3-Inch
    • 11-Inch Barrel: 10.5-Inch
    • 16-Inch Barrel: 15-Inch
  • Overall Length:
    • 5.5-Inch Barrel: 13.7-Inch
    • 8.3-Inch Barrel: 16.5-Inch
    • 11-Inch Barrel: 19.1-Inch
    • 16-Inch Barrel: 23.8-Inch


  • 9mm AR lower receiver


  • 1x Aero Precision EPC-9 9mm Complete Upper Receiver


The Aero Precision EPC-9 9mm Complete Upper is the ideal choice for serious shooters who are looking for the foundation they need to achieve the ultimate level of defense readiness.


This upper is a high-quality, reliable upgrade that is ready to support the installation of other accessories. When combined with practice and the installation of accessories to cater to your needs and preferences when shooting your AR-15, you may improve the accuracy and handling of your weapon.

The ATLAS Handguard is included with Aero Precision's EPC-9 Complete Upper Receiver. Durable without sacrificing a slim profile, the Atlas Handguard was strategically engineered to be the ideal weight and size to support the tactical needs of serious shooters.

Featuring a sturdy Picatinny rail to provide generous space for attaching accessories, this EPC-9 upper is ready to execute your plans to customize your weapon to your preferences.


Aero Precision's reputation for quality continues with this upper receiver, manufactured from 7075-T6 forged aluminum, ensuring durability from the start. In addition, the interior and exterior of the Aero Precision EPC-9 9mm Complete Upper is coated with a QPQ finish to protect against corrosion, giving you a reliable upper to depend on for years to come.

To facilitate handguard timing, Aero Precision added dimples above the threads. Most AR-15 barrel nuts can be used, and the upper features the Standard AR-15 takedown pin lug pattern, making installation more efficient.

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