The M4E1 complete lower receiver serves as an ideal foundation for a custom AR-15 build. This fully assembled lower includes the M4E1 lower receiver equipped with an A2 grip. Purchasing the complete assembly offers cost savings and ensures professional installation by our specialists.

The M4E1 complete lower receiver serves as a customizable foundation for AR-15 configurations, incorporating Aero Precision M4E1 lower receiver equipped with an A2 grip
The package comprises a mil-spec lower parts kit, an AR-15 rifle receiver extension and an AR-15 rifle buffer and spring
The lower receiver features an anodized black finish and is engineered to accommodate cartridges conforming to the 5.56 mm NATO specification

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If you live in California, please read this notice before ordering.

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.

Magazines will be removed from firearms when shipping to states with magazine capacity restrictions.

Must be 21 or older to purchase.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).