The .300 AAC Blackout continues to earn its reputation as one of the most versatile calibers on the market and the BR4 brings that versatility into reach for shooters navigating restrictive regulations. Featuring a 14-1/2 inches barrel, the BR4 is outfitted with a pinned and welded ZEROED SVD muzzle brake, extending the barrel's overall length to 16.1 inches, eliminating the need for an NFA tax stamp. This practical setup doesn't just simplify ownership, it also enhances performance and delivers a sleek, aggressive profile that ranks the BR4 among the best-looking rifles in its class. Whether you're running subsonic loads suppressed or maximizing terminal performance with supersonics, the BR4 in .300 AAC Blackout is built to excel.

Designed for compliance, this is the rifle for restricted states, delivering performance without compromising legality
The Br4 offers firearm owners in restrictive, 2A-unfriendly states a modern and capable carbine option, combining compliance with performance
By blending traditional controls and familiar ergonomics with cutting-edge engineering, the Br4 is ready for hunting, self-defense, sport shooting and beyond
The adjustable gas block allows you to fine-tune your rifle's gas system for optimal performance across different ammunition types and shooting conditions
For suppressed shooting or precision tuning, the adjustable gas block lets you dial-in just the right amount of gas, never too much, never too little
Every CMMG product is covered by our lifetime quality huarantee, a testament to our unwavering commitment to quality and craftsmanship
We stand behind our work, every CMMG product is backed by our lifetime quality huarantee, protecting against defects in materials and workmanship

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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.

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

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).