Forged from 7075-T6 aluminum, this upper receiver offers superior strength and durability, essential for any reliable rifle setup
Precision-machined to M4E1 specifications, this upper receiver offers consistent quality and compatibility across builds
M4 feed ramps enhance feeding reliability and ensure smooth chambering of rounds during operation
Finished with a matte black hard coat anodizing to Mil 8625 type 3 Class 2 specifications, this upper provides excellent corrosion resistance and a sleek appearance
Laser engraved T-marks on the receiver enhance usability for mounting optics and accessories, ensuring precise alignment
The upper comes assembled with the port door and forward assist installed, streamlining your build process
It accepts standard AR-15/M16 components, providing compatibility and ease of assembly for your rifle
The handguard mounting platform is forged into the receiver, enhancing strength and stability for attached components
This upper works with Aero Precision handguards but also fits most BAR-system handguards, providing versatility in accessory options
A barrel nut and wrench are included, providing everything you need for installation and assembly
The 1-piece free-float design enhances accuracy by minimizing contact with the barrel, allowing for better harmonics
A removable 4-slot picatinny rail section for the front sight allows for customization and flexibility in accessory mounting
Built-in anti-rotation tabs ensure a secure fit and prevent movement during operation, enhancing reliability
With 7 mounting surfaces for KeyMod accessories, this upper provides versatility for attaching various accessories
The 1.78 inches inside diameter fits most muzzle devices and 1.5 inches suppressors, offering compatibility with a wide range of aftermarket components
The upper is compatible with low-profile gas blocks, allowing for flexibility in gas system configuration
A QPQ corrosion-resistant finish both inside and out enhances durability and longevity, protecting against wear and tear
The M4 barrel extension provides compatibility with standard M4 components, ensuring reliable feeding and function
This assembly has undergone HP and MPI testing, ensuring that it meets rigorous performance and safety standards

Features

The Aero Precision APAR640101M1 Complete Upper is a premium assembly designed for functionality and versatility, featuring Aero Precision's innovative Quantum Handguard. Key highlights include built-in anti-rotation tabs that enhance stability and ensure a secure fit during use. The handguard also incorporates a removable 4-slot Picatinny rail section, ideal for mounting your front sight, while providing a 7-slot mounting surface for additional accessories, allowing you to customize your setup to fit your needs. Please note that this complete upper does not include a Bolt-Carrier Group (BCG) or charging handle, giving you the flexibility to pair it with your preferred components. Elevate your AR-15 experience with the APAR640101M1, engineered for both performance and adaptability.

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.