The .300 AAC Blackout remains one of the most versatile calibers available and the BR4 takes full advantage of that versatility, especially for shooters working within legal and practical constraints. Featuring a 14-1/2 inches barrel, the BR4 is equipped with a pinned and welded ZEROED SVD muzzle brake, bringing the overall barrel length to 16.1 inches. This smart configuration keeps you clear of NFA tax stamp requirements while delivering enhanced recoil management and a distinctive aesthetic. The result is a rifle that's not only legally streamlined but also stands out as one of the best-looking and most capable options in its class, ready to handle everything from close-quarters work to suppressed performance with ease.

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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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.

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).