With subsonic and supersonic loadings tailored for self-defense, hunting and precision shooting, the .300 AAC Blackout stands as one of today's most adaptable cartridges and the BR4 is built to harness its full potential. Whether your mission calls for quiet suppressed fire or maximum velocity, this .30 Cal carbine blends real-world practicality with bold, modern styling. Outfitted with a full-length top Picatinny rail and a versatile M-LOK handguard, the BR4 offers endless customization options, letting you configure it to match your needs. Combining performance-driven features with head-turning aesthetics, the BR4 is the perfect companion for shooters who refuse to compromise on function or form. 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