The Brownells M16 5.56x45mm complete 9310 bolt assembly is engineered for durability and reliability, making it an ideal choice for both semi-automatic AR-15s and fully automatic M16 rifles. Crafted from robust 9310 steel, this bolt assembly is designed to endure the rigors of demanding operational environments, ensuring consistent and high-quality performance. Each component, including the bolt, gas rings, extractor and ejector, is meticulously installed and tested to meet stringent standards. Whether you're in the field or at the range, the Brownells M16 5.56x45mm bolt assembly delivers the resilience and precision you need for optimal firearm functionality.

Material quality is verified using magnetic particle inspection
The extractor is equipped with a spring and a rubber insert
Designed for compatibility with all 5.56x45mmbased casings

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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 lower and upper receivers and threaded barrels, are subject to complex and frequently changing federal, state, and local laws and regulations. While a part may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using it in certain states (e.g., California, Washington State, Virginia, Rhode Island) 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.

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).

Brownells Bolt Assembly .223 Remington/5.56x45mm/.300 AAC Blackout, Black