With versatile subsonic and supersonic loadings suited for self-defense, hunting and target shooting, .300 AAC Blackout stands as one of the most adaptable cartridges available today. The BR4 embraces this adaptability, delivering a .30 Cal carbine that blends practical features with bold style. From the full-length top Picatinny rail to the M-LOK handguard, the BR4 is ready to mount your optics, lights and accessories with ease, giving you a platform that's as functional as it is refined. Whether you're dialing it in for quiet, suppressed performance or maximizing energy downrange, the BR4 offers versatility without compromising its aggressive, attention-grabbing design.

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
Whether you're shooting suppressed or simply tailoring the rifle to your preferred ammo, the adjustable gas block gives you total control over the gas flow
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).