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