The Maxim Defense MXM47838 Roller Delayed Blowback System Buffer CQB is a precision-engineered steel component designed for 9mm Luger AR-15 and AR-9 configurations, delivering reliable smoothness and consistent recoil management in close-quarters builds. Built with durable steel, this buffer system leverages Maxim Defenses proven roller delayed blowback technology to optimize cycling reliability, reduce felt recoil, and improve follow-up shot speed, especially in compact CQB setups. The CQB Buffer Tube is a dedicated upgrade for compatible platforms, enabling a cleaner, lighter, and more controllable AR platform experience without sacrificing rigidity or durability. Ideal for pistol-caliber carbine enthusiasts, competition shooters, and tactical-minded operators seeking enhanced weapon handling, the MXM47838 works harmoniously with standard AR-15 receivers and 9mm upper assemblies to maintain predictable ejection patterns and steadier aim during rapid fire. INSTALLATION is straightforward for those familiar with rifle recoil parts, and the steel construction ensures long-term performance in varied conditions. Whether optimizing a duty-ready build or a high-accuracy, compact sporting rifle, this Maxim Defense buffer component delivers improved recoil mitigation, steadier grouping, and dependable operation across a broad range of 9mm AR platforms.