The M5 .308 Cal complete lower receiver serves as an ideal foundation for constructing a custom big-bore AR rifle. Purchasing the complete unit offers cost savings and professional installation by our specialists is available to ensure optimal performance.

Compatible with standard AR-308 components and magazines
The rear takedown pin detent hole is equipped with threading compatible with a 4-40 set screw
The bolt catch is designed with threading to accommodate a screw pin, eliminating the need for a roll pin
Integrated safety enclosure
Selector markings are compatible with safety selectors set at 45, 60 or 90 degrees
Compatible with Battle Arms Development short throw safety selectors; also supports standard safety selectors
Aftermarket pistol grips exhibit no gap

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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).